The charges are per the agreed upon terms - you pay your deposit to post the question and are charged the balance upon corresponding with an expert.
Not all issues have an immediate fix.
In cases such as this, I'm limited to diagnosing and explaining the problem and giving you the necessary information to resolve it. In this situation, we've done everything we can and determined that it is a line issue, which requires outside intervention.
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.