TERRIBLE SERVICE AFTER PRODUCT UPGRADE

I have been a supersonic client for over 3 years. Have had issues in the past with connectivity on my line where I had to log an ICASA complaint before they actually did something to fix it. I had a year of no issues and decided to upgrade my line to a 200/40 line which took a week to do (this was upgraded on Tuesday) after the upgrade I have had connectivity and stability issues on the line. And unable to get speeds over 2mbps. I called this morning and spoke to a gentleman who opened a ticket said I would have feedback by 11:00. I work from home and require my wifi for that and have not been able to work because of this. I called back a few minutes ago to get feedback and NOTHING has been done as yet. SO I have now given the ultimatum that this be rectified by 15:00 or I will be logging a new ICASA complaint as I am not going to be given a run around again for service that I pay for.