Bad New customer service

Bad new customer service - Since our wi fi was installed it is buffering so much that it takes us 4 hours to watch a 90 minute movie and cant listen to music on Youtube as it buffers the whole time. I have phoned Vox so many times and everytime the agent is doing troubleshooting and tells me it should be fine just to check it a minute later and find the exact problem. Then a technician was sent to our house and he advised that we up the speed to 10/10 which is more expensive but we did that. That also did not solve the problem ans we were told that they will log a call with Vumatel but till today we have not seen a technician from Vumatel and STILL HAVE THE SAME PROBLEM. And then I get an invoice from them, hahaha Vox you are such a joke.