Blacklisted for an account I cancelled

In March 2019 I left South-Africa and cancelled my Vodacom subscription. You continued to send me bills for a cellphone contract. I paid more than R7000 in 2020 on cellphone bills that I don't use and need. I again asked your customer service multiple times via email, message and phone to cancel my account.

I am currently applying for a mortgage in Ireland and was shocked today to see that again there are R7000 in outstanding bills with legal notices from Vodacom. You have not contacted me about this in 18 months.

I am a finance professional with a brilliant credit record and you are now the reason why I can't buy a property abroad. Please sort out your accounts department.