Cancellation and Refund Horror show!!!!!!

There was a payment made in error for a new installation when I already had a service existing. The link sent to me to make a manual payment was incorrect and created a new service instead of paying the existing one and I'm awaiting cancellation since the 4th of March. the 1st Agent said the incorrect new service would be cancelled within 3-5 business days when I checked again it changed to 8-10 business days and even after that no one can tell me how the cancellation is going when I chat on WhatsApp, they take long to come back to me and end the chat. I have been without internet since beginning March and no one wants to resolve the issue and the supervisors never call as requested. Trash fibre, trash service don't go to this provider. you will regret it!!!!!!