Refund requested for no service rendered

I have send numerous emails to Supersonic requesting my refund for the monthly deduction they made for services never rendered. I ordered a fibre line from this service provider, however installation was never done. I waited 2 months with constant emails to this service provider to no avail and I opted to cancel. July 2024 after I cancelled with them in April, they decided to deduct a monthly premium. To date, after numerous emails, they still have not refunded me. This is the type of Service they provide