Not getting what I paid for

Upgraded from 50/50 fiber to the home to 75/75. This was mid February. I am still receiving service at the old speed but paying for the new speed. Every time i call, I got told someone will get back to me, the problem is with metrofiber. So I got a ticket on 5th of March from vox. I called in today to check progress and got told they are waiting for communication from metrofiber. I phoned metrofiber. There's no tickets or anything on my account, so according to metrofiber, the matter hasn't even been brought to them yet. Pathetic service.