Not happy with Gen Ryan service. I had kitchen sin...

Not happy with Gen Ryan service. I had kitchen sink clogged. Technician gave me a quote $300 to fix the problem. I said OK go ahead to do that. In the end he couldn't make it work at all. But he still charged me $300. He said "at least I tried". After I paid him a check, he said "if you really want to fix the problem, I can come back again with another guy bring a jetter ...". He said that would cost $1200 but he made an offer to only charge $900 after $300 discount. I was afraid if I accepted his offer, they would charge me $900 anyway even if they couldn't fix the clogged sink again because they can always say "at least we tried" to make a charge. I will not call Gen-Ryan service again.