Disgusting service!

I have been struggling to get the Fibre download speeds I have been paying for for 6 months now. My money has been perfect every month... Originally I was told that Frogfoot had capacity issues in the PE area so I waited. About two weeks ago I started asking again and I was told that the Frogfoot issues had been resolved. My download speeds are still half of what I am paying for. Since then I have logged tickets. NEG-***9, GLB-***7, XMN-***8, NSQ-***1, NEG-***9. I have begged for a manager to phone me, I have tried to call - the phone disconnects. I have tried Twitter, I have sent please call me's, no one is helping! They just keep asking me to do tests. This has really gotten disgusting!