Whilst I am the first to admit Mesh could do a better job communicating with its customers I do think your tone isn't going to exactly endear yourself with Mesh staff or encourage them to go beyond the call of duty to help. I have found the best way to get results with any customer service department is to remain polite and friendly but firm.
After all they're just people too and the person at the end of the phone didn't cause your monitor problems.
If you are genuinely that aggrieved with your experiences I would recommend writing to head office (
MESH Computers - Award Winning Review PCs Since 1987) detailing your complaints, the time of the calls, who you have spoken to and what they said.