Confusing notifications

On 21/4/18 I received a sms at 9:31 from the attorneys informing me to pay R1085. 00 in 20 days as I did not pay Dr Snyders. I phoned and informed the gentleman that I am not aware of that and requested a statement of account. At 11:07 I received another sms demanding a payment of R1104. 90 and at 11.12 I received an email from KG Mphuthi that I now have 7 days to pay R1112. 14. I phoned her and informed her that I do not appreciated the tone of her email en again requested a statement. I also requested proof of when I was informed by Dr Snyders office regarding the debt. On 23/4/18 I paid the capital amounting R340. 01 as the rest was attorneys fees that I do not understand why I have to pay since I never was ibformed of the debt and I was under the impression that my medical aid settled the account. On 23/4/18 I phoned the attorneys office and spoke to Tia. I explained that the dr passed on and the lady at her rooms referred me to accounts whose number does not exist. Tia informed me that she will get back to me, however I had no feedback yet. In 3 days I got 3 different notifications with 3 different amounts and 3 different deadlines to pay. The staff was highly unprofessional and just kept on threatening me that I have to pay and I have no idea for what