Appealing customer service

I have decided to open an account recently with TFG online got back and I was declined called up to enquire about it they told me in 2019 I had an old debt which was opened in 2010 or before and that debt prescribed longed time ago I was asked to call the debt collectors I did and they granted me letter of prescription to give to TFG to update their system, apparently they never updated it and now when I call and put in my details they still claim that I owe them though I have given them the prescription letter and the prescription period was not interrupted. I spoke to Joe today customer services agent to enquire from her why do they still have that information there’s a clause in their Terms and conditions or Privacy Statement states under the CONSUMERS CHOICE “ It is very important to us that you are aware of your rights when it comes to your personal information and we therefore need to inform you of the following options:  you may enquire what personal information about you we hold and process;  you may ask us to update, correct and/or delete your personal information;  you may unsubscribe from any of our direct marketing communication;  you may object to us processing your personal information. To update, correct, to delete or de-identify your information (where possible), please contact Customer Services on the telephone number below. Please also refer to TFG’s PAIA Manual for the process to request access to certain records which we my hold about you. When you opt-in to TFG marketing, you are opted-in to all of our lifestyle brands and channels. When you opt-out of a particular channel, you are opted-out of that particular channel for that brand. In order to opt-out of all TFG marketing (for all brands and channels), please contact Customer Services on the number below. Note: it could take up to 48 hours for your updated election to take effect. TFG’s contact information” I asked them to remove this and the lady was rude and spoke over me no sense of customer service at all JOE WAS VERY RUDE I DONT KNOW WHAT TRAINING SHE GOT BECAUSE HER CUSTOMER SERVICE SKILLS LACK THAT! Skills can someone please clarify wether I have no say I’m my information being kept without my consent!