Vula Collections (ex Colmed) - Poor service/response is an understatement

Vula Collections have taken over from Colmed debt administration. Paid the account in full to Colmed on the 7th of Nov 2022 (an account that could have been settled in 2018 with the medical aid, if they had notified me about it, but only received notification about this when Colmed called in March 2021...a whole 3 years later). Received an email from Vula on the 11th Nov 2022 stating that they have taken over from Colmed & that money is due etc. Emailed them the final POP as well as the mail thread with Colmed confirming the same, however no action or allocations were made as I'm still receiving SMS's threatening ITC listing. Whatsapps were then sent to the numbers they advertise. The messages are being read (blue ticked) but still no response... Vula Collections, please advise what is going on???