Fitness Repair Parts Very rude, poor customer service St. Charles Montana

Ordered a treadmill motor. The motor arrived and was professionally installed. The noise issue persisted, so we went on to replace all of the internal electronics (from a different company). After everything was replaced, we realized the new motor was defective. Fitness Repair Parts refused to exchange it because it was after 15 days. I explained the issue, we had no idea it was defective until we replaced the other parts. Their excuse was their "system" does not allow any return after 15 days. I asked for a little common sense because of my situation and they were very rude. Another excuse was most other parts companies don't allow returns at all. I stated this had nothing to do with this issue and again, they were very rude. Avoid this company.