Slow connection

Hi my name is Ashay Mansraj I keep having problems with my fibre speed and connection it keeps saying connected without internet connection or the speed is very slow please help i did log a ticket with my isp my ticket number ***6 can you guys please send someone out to assist with the matter as I having this issue for a few months now and I have been a loyal customer for many years my contract number is *** my address is 195 fernham Drive Redfern Phoenix Durban please assist me with the issue as it's urgent thank you