Bad bad service

Bad service from the call center staff,, I gave birth 09 May 24,all blood test done on the baby, they claimed and got their money, after so many months I'm getting an sms saying I owe them R3880, I called the call center and was transferred to the Acc department, saying they claimed more than 3 times and their system can no longer allow them to claim, yet My medical aid days they submitted incorrect ref for the claim, I asked them for a claim document so I can forward it myself, Keamogetswe promised to send me the doc, though I had to ask many Times to stay on the line till I get the document, now I'm here owing R3880 for the mistake lancet made, busy receiving threatening messages, their service is so pathetic, I can't even claim from medical aid since I don't even have a form but they are quick to demand money from us