Unsatisfied with client service

I received notifications out of the blue that I was handed over for my unpaid bill, not even knowing that I had an unpaid account because I settled the full account in cash when we left the emergency Unit of Die Wilgers Hospital and I even confirmed with the gentleman and he also said everything has been paid, that was 11/05/2025. Months later, 15/10/2025 I received a SMS that I was handed over due to on unpaid bill. immediately I called the number on the SMS and asked them why I was handed over and what account was not paid, they could only tell me that it was for a bill, and the amount is R270. They could not provide any details of that account, so how was I handed over with no proper details and them demanding immediate payment? I called the accounts department on 15/10/2025 and spoke to a gentleman with the name Miguel Sebastian, I asked him about the account, but the information was also not clear, He also confirmed that there is no trace of any communication that was send to me only an SMS 13/05/2025 but I never received the SMS and he did not want to acknowledge my statement that I never received that SMS. I told him that I will not pay anything if I don't get proof of what I did not pay (statement) and also if my name has not been removed from handed over status because that was not my mistake. He made a promise that he will send an email for my name to be removed but refused to provide me with the proof, saying that it is an internal communication email, he said he promised me that he will sort this out for me and that he will call me back on Friday 17/10/2025 and also did provide me with a black email with the subject line Lets keep in touch. Friday 17/10/2025 after 12 still no call, so I followed up via email but never received a reply. Just before 15:00 I made a call just to find out that the department was closed for the day due to a team building event which he never informed me after making promises that he will get back to me. Agin today 21/10/2025 I followed up via email and decided to call. A lady with the name Alicia answered and said that she cannot assist as she is having system problems, but I must give my details, and she will email me. I told her that I will not fall for the email communication because I was promised communication before and nothing happen and asked if there is anyone that can help and her reply was no, I asked if she is the only one working there and she said yes everyone is busy, I then asked her why can't I give her my number to call me back and she said no because she might be too busy and will not have time to call back and become rude and asked for my number. I just dropped the phone because how can they have to time to send emails but will not have time to call a client back? I called again hoping to speak to someone else and with my luck Miguel answered, trying to avoid my unhappiness that he never come back to me, his reply was by the time he spoke to me 15/10/2025 he forgot about the team building and he was working from home, so if he was really working from home why not providing me with the details also not replying on my follow up email, but no response was given. he said they are busy with it and he did send another follow up and once again said he will get back to me, but this is really ridiculous for R270 and again I received an SMS that legal action will be taken if payment is not received. Demanding a payment for R270 with no proof or any proper details is really no on