WiFi problem

Firstly i have a problem with my WiFi since last week Tuesday it loses connection, it will go for 10-15 minutes no connection and restores for less than 5 minutes and drops again and this happens between 6pm - 11pm. I called for the first time the agent said everything is fine but nothing changed. I called again on Sunday and the agent that I spoke to said she has escalated the matter I was given a reference and told that a technician will call within 48hrs. The technician called today (Tuesday) but I was at work he said I must call in the evening, I called back thinking I would be transferred to the technician only to be told by the agent that she is escalating the matter again and that was it. Secondly it's been a month now and I cannot access my account on the supersonic portal the page will just be loading. I have also reported this issue several times but nothing. To think this is my 2nd month using supersonic and I'm already facing all these challenges, it's really disappointing.