Avoid, better customer service elsewhere

I purchased a metal building from Mr Carports on 6/23/23, signed the contract and paid the deposit on 6/26/23. They are only a dealer, so they hired Custom Built Structures (here's the kicker, both companies have the same address) to supply and install my building. I was given a full amount of $6338.56 and I informed them that I would like to add an additional $500 in the event that there were potential unforeseen issues with getting my building installed in a timely manner. I provided pictures, distances, dimensions, etc so that they would be well informed of the site. I was originally told 10-15 business days for installation to begin. My building was not installed until 8/25/23. The first crew showed up on 8/2 (5 1/2 weeks later, 27 business days) and promptly turned around, stated they weren't doing the job. I had to call the company numerous times throughout the day until someone would actually pick up the phone and asked for an explanation. I was told the crew didn't feel like they could do it although I had originally stated I was willing to pay extra to make sure no issue arose. We went through multiple dates where they were supposed to install it, but never showed, always rescheduled and I had to repeatedly call to figure out any information. I was never a priority although they *****ed up from the beginning. I had to continually reschedule movers and an electrician because of the failures of this company. Carlos (a manager) promised me that he would get $250 refunded because of the issues they caused me. I requested he attempt to get all $500 refunded. When it was finally installed on 8/25, I was told the company is not willing to deduct the $500 (or anything else) that I offered up front to avoid issues like I had experienced. I repeatedly requested that happen, but they refused, claimed they had done no wrong. The office manager (Elizabeth) of the company refused to let me speak with the owner when I asked.