Slow internet connection

I got a fibre line from this ISP. It has been extremely slow for the past week. And very frustrating as one has to work from home.

My attempt to contact the call Centre to log a query was also beyond frastrating as I had to wait for a whole 45mins to get my call answered. A whole 45mins!!!!! And when the operator answers am placed on hold for very long..... The call lasted 1h11mins and still the cause of slow internet connection was resolved.... Been upgraded to a 200mbps line but still performing like 2mbps line.... So frastrated.