New problem with severe lag

Dear Kate,
For 2 months, I've wasted hours of my time trying to convince grasshopper there was a problem in your software. I kept getting blamed. I got a new modem, got all new cables reinstalled with new connectors, and I mean from the street to my home, not just a little modem cable. I lost business due to not being able to have telephone conversations. I spent hours explaining, and re-explaining, the problem starting from scratch too many times to count because nobody at grasshopper would maintain notes or constant thread, you kept flowing it off. I started this forum thread, I did call logs. So I finally had to change my service since I could no longer use grasshopper to make phone calls. So this morning, my final porting completed to a new service. I canceled my grasshopper account late this afternoon. I was told tough luck on 6 months of prepaid money, no refund available because you still said it was my fault.
Within an hour of my cancellation, I get this email from you. I demand a refund of the prepaid money. I should send you an invoice for all of my hours of time and effort trying to convince you that you had a problem that needed to be fixed. Now you admit that you fixed the problem you kept denying. Please advise when I will get the refund issued.

We've had couple 20+ minute calls that experienced no noticeable lag yesterday and today so I think this issue has been resolved