poor customer service

I was looking forward to adding two new exterior doors to my home.
At the beginning of November I had chosen 2 doors.
Almost two weeks later someone came to assess the installation, then waited a couple of days, for a follow up but never got a call back. I went down to the store to finalize the purchase but there were questions regarding the wording in their promotion.
It stated " Do not pay for 12 mths on any installed sales ( min 500.00 OAC)" I don't think it could be any clearer but I was told that the ad only applied to the installation and not the product. Someone would get back to me. Another week went by and no one called back. I phoned the store and was told (abruptly) they would send me an answer to my query and an estimate by email.
Another week went by and no email or call back.
Frustrated, I wrote a letter to the manager of the store, and never got an answer or an apology for the lack of customer service that I received.
It's unfortunate, that was my experience with this store.