Dishonesty and unable to talk to anyone

What’s happen to the ethics and honesty from companies

I reduce my subscription as my contract term finish and went on a month to month some months ago

I called in a week ago and stated I what to do a upgrade only to be told I can’t as I done a upgrade to a new contract

I the asked to tell and show me the proof of the upgrade that they can provide but that I can prove it wasn’t by the correspondence received from the stating I can change or do what I want after a month as I am now on a month to moth

The more I spoke the more I was told they can do nothing as my contact is only expiring in 2028 even though I provide the documentation it’s not

I have been promised managers would call me but to date nobody has

I have been trying for day but keep been told someone will come back to me but this never happens