I have to pay for rains mistake.

About two weeks ago my speed suddenly dropped from 100+ to 30 mbs. I did not know why. So I called in. I asked them to look at it and they just said to factory reset it and reboot. When. That did not work they said they would esculate the issue to the relevant teams. I waited and no one came back to me. In this two weeks no one tried to fix it. I had to call numerous times to just get. Help. The Saturday they realized it was on there end that the back end policy did not show a 100+ mbd but only 30. Which was a cloth or mistake caus ei have been paying for the high speed since the very start. Then when they reached out to billing to just fix it. Billing did not do anything then in a moment off anger I called again Sunday. The guys then tried to help but made a mistake and downgraded me without my consent. Then told me he will have billing sort it out. Then Monday I called only be told I am now on the 30 mbs and I need to pay to do the upgrade. But I was on the high end plan from the beginning and it was there mistake. And they want me to pay for there mistake. The it was sent to billing again. Today I phoned again the whole day no one did anything. I called and called and called. And no one from billing or anything did anything. I had to cansel 24 of my online classes because the speed is to slow. So I am losing my livelyhood. And still nothing has been done. I have all the phone calls as recorded as proof as well as emails. That if the don't sort it out. I will share on my social platforms.