Valvoline Instant Oil Change

So I took my car in for an oil change. The car had no oil leak before brining it in but after bringing it home I noticed a spot of oil on the pavement. I took it back a few days later and the tech took a look and he said that the oil filter had not been put on properly and apologized all over the place and gave me a half off coupon for my next visit. A couple of days later same oil spot on the ground. I take it back in and a completely different attitude. The guy (different guy) tells me it’s my oil pan gasket. I explained that the tech I had seen previously said nothing about the oil pan and explained it was something else. He said that he didnt know why it had no leak before the oil change but that it was an oil pan leak, no let me get someone else to look at it, no let me see what I can do, nothing. Here is the problem this has happened to me three previous times with three other cars each time it was a faulty oil filter. I should learn my lesson and I think I have. I wont be going back again.