Complaint - Virgin Money

I Just received a call from Virgin Money stating they are going to discontinue their credit cards from end december 2020. I closed my account more than 5 years ago, if not 10. What is upsetting me is that i am receiving the call, so why do they still call me if my card is closed. a few years back, someone did investigate the matter, but as per usual, that person just did not reply to any communication i've sent. Requested me to give my details to investigate , still no answer. I want someone from Virgin money to get back to me ASAP regarding this matter, and i want proof of my closed account. Previously when i use to work for Absa when i closed it, it stated on their system closed. Not again i want proof.

Urgency to this matter will be appreciated.