It is really sad to hear you are still having a problem contacting Mesh. I'm sure that their Representative will see your thread in the morning and reply to you.
It must be extremely frustrating for you to have a PC that is not working as it should, even more so, to feel that you correspondence is going unanswered.
You have maintained an amount of calm that I would find difficult to do. Your thread is well written under the circumstances, and amount of money involved, I wish you well and trust that Mesh will respond soon and, I'm sure will put matters right. Best regards. j.