Poor internet, empty promises

For the past 3 days, even though I have signal reception from a tower, the internet connection is beyond pathetic. I obtain download speeds of 200 kbps with latency of 2.28s and jitter of 1.49s. I work from home for an international company and I cannot do my work with this pathetic excuse of internet. You have sold me the product with guarantee of coverage (which I have) and service,which I DON'T have. This is not a once off issue. This occur almost every 2 - 3 months and I have been raising the issue for the last 4 - 5 years. Pathetic is not a strong enough word.