Leak in a hot tub question?

We had a leak and the hot tub repairman came and claimed he fixed it and charge me $200. The next day I noticed water still coming from the same spot as before. The leak is really slow but its still coming out. The repairman said its very common for another leak to come after one has been fixed. Does anyone know if this is true? I don't want to have to pay again to fix this leak if maybe there is a chance that he didn't even fix the first.