Mohammadreza in Calgary

We have moved in our house almost 18 month ago and there has been some issues with the house that they agreed to fix under warranty. I have been following up on them and they seem they do not care about their customers/promises what so ever. Recently (early October), I sent them the list of works they had agreed already to fix and I was told that my email was sent to Mark Stillman, the WestView warranty manager, to follow them up personally. But, guess what. I have been never contacted regarding them since then. I am wondering if I can get them fixed and send them the receipts and ask them to reimburse me for the cost?