Reliance The Furnace Company Edmonton

This year: (1) A Reliance plumber declared one of my toilets irrepairable because it was too clogged with urine crystals. I bought 2 bottles of Javelin Urinal Treatment (at a cost of $48) and solved the problem myself. (2) That same plumber said I needed to replace a bathroom faucet in order for the drain stopper to work properly. But several weeks later, a second plumber from Reliance fixed that problem in a couple of minutes (without the need for a new faucet).
(3) That second plumber broke one of my toilets while attempting to fix a water leak coming from the tank. It cost me $425 for a new toilet, with free installation. (4) Following Reliance's 3 failed attempts to stop my allegedly-irrepairable toilet from continuing to drip/run, I scheduled a plumber for 13 May to hopefully solve the problem. NO SHOW. NO PHONE CALL. NO EXPLANATION. So I rescheduled for 25 May (5) 25 May: I called their customer service for confirmation that a plumber would actually be coming to my home. I was told that I was next on their call list and that the plumber should be at my home in about an hour. NO SHOW. NO PHONE CALL. So I recalled customer service and was told that Reliance had overbooked for the day [contrary to what I had been told only a few hours before] and that a supervisor would call me that day or the next day to discuss. I rescheduled for 27 May. NO PHONE CALL. (6) 27 May = NO SHOW. I contacted customer service and was told that Reliance only had one plumber and Reliance did not know when he would be available. I disputed that explanation, providing the names of 3 Reliance plumbers who had already been to my home this year. I was told my account was red flagged for "some unknown reason." Customer Service told me I could not reschedule. So I called Reliance in Edmonton. (7) 28 May: The Edmonton Service Manager called me saying he would review my file on 30 May and let me know what's happened. (8) 31 May: The Service Manager called me saying that Reliance has decided to suspend all services to me because of some safety concerns their technicians have reported. My knowing full well that there were/are no safety concerns, I asked him to elaborate. He refused, stating that he had been advised to be very general in his conversation with me, unsure of what he could legally tell me. I stated that it was very unfair to me to not be given the chance to discuss those concerns that led to Reliance's decision to cancel my Home Comfort Plan. I stated that I may have no choice but to take legal action. He said he would have the General Manager contact me to discuss the situation. (9) 31 May: the General Manager called me. The only additional clarification I could wrangle out of him was that one of the plumbers told him I had made a comment about his [the plumber's] head when he was on my floor working. What comment? Why? No answers. I stated that I may have no choice but to embark on legal action [suspecting possible defamation of my character, and definitely if Reliance refuses to refund the money I have already paid them toward my annual furnace maintenance which I planned to have done in September]. He agreed to talk to all the plumbers to get specific details about their alleged safety concerns, and then get back to me by phone.
About me: I am a skinny, 71-year-old male with bad knees and osteoarthritis. I have never sworn at, or even raised my voice to any Reliance customer service reps, supervisors, managers, or technicians. I have certainly never threatened any of them or made disparaging remarks to any of them.