Yahoo

I've not been receiving any e-mail on my Yahoo e-mail account for 5 days, despite people sending them to me. To make matters worse there is nobody you can ask for help with resolving the matter.

I upgraded to their premium account hoping this would solve the problem but it's made it worse. They have now given me 2 e-mail addresses I didn't ask for and have only just found by checking my account details, but again I can't access these e-mail details.

Does anyone have any ideas on how to solve this problem please?