NO F*888 SERVICE

I so wish there was a zero star rating. I'm about to blow my lid. I've upgraded a few weeks ago, much to my dismay now. Yet this afternoon I get a call for an upgrade. But not to my main number, but another number I've requested to be cancelled, so what the hell. When I call 135 I get the usual recording about this call will be recorded blah blah blah, one ring and it goes dead. I have phoned numerous times to sort out the incorrect spelling of my email address. I don't even know how many times I've called to correct the spelling as I'm not getting invoices and statements due to incorrect spelling of my email address. And everytime i've called, I've been told it's been corrected. Yet same problem.... On 29 June 2022 I've requested the same, with the same answer and asked to send me my latest statement. I received an invoice and statement dated 12 Dec 2020. REALLY??? HOW CAN I SPEAK TO SOMEONE TO SORT THIS **** OUT? And if I can, Can I please cancel my contract... I am more than happy to move to another service provider.