Bad customer service

For weeks I have not been able to log in to my online profile to access my account. I sent TFG an email and they asked me to call them for verbal confirmation and I did so on Sunday. The person I spoke to said it should be sorted and I should try in an hour. I tried 2 hours later only to find that the email address and phone number linked to my card is not mine, which I believe is the reason I have been unable to log in. I sent TFG an email on Monday morning with a screenshot of the email address and phone which do not belong to me and I asked them to contact me to sort out the mess they made. Today is Wednesday no one has bothered to call, let alone email me. I'm so disappointed in them and lack of customer service