I'm sorry for any misunderstanding - I'm just the tech here, I don't manage any of the site functions.
Leaving a bad rating hurts me personally and could cost me my job.
The ad you saw should have been quite clear that it is a $5 deposit to post your question, and you are charged the balance of the agreed upon fee (which would have been displayed prior to putting your card in) after you receive a reply from an expert.
I'm sorry if that was not clear, but honestly you're still getting a better value for your money than you would elsewhere. If you had taken the tv in to a repair shop, you'd be paying $125 for the exact same answer, just to have them look at it.
I am an independent technician and I've spent my personal time, unpaid, in an effort to assist with the question for which you solicited my services. This site works on the honor system, and to that end, I have prioritized working with you ahead of other paying customers.
Although you’ve already paid your fee to the site, I am only compensated for my efforts when customers such as yourself leave positive feedback for my work. Again I apologize there is not a better outcome here, though this is really beyond either of our control. I do hope you’ll consider leaving a 5 star rating for me, rather than “shoot the messenger”, so that I may get credit for my time spent in good faith to answer your question accurately.