Medical aid suspended for no reason

I am absolutely frustrated with Bonitas. We have been with Bonitas since 2017 when Liberty medical scheme was taken over by Bonitas. I was told I was in arrears with an amount of R3260 which I was not aware of and could not understand either as my medical aid portion goes off through the company and not my personal account. I however made an arrangement to pay it off over 6 months and signed a letter of consent for the money to be deducted. I did my part however Bonitas did not deduct the money for the arrangement of the arrears and has since then been suspending my medical aid. I pay my premium every month and have made arrangements for the arrears (which I still don't understand how that even came about) yet you guys suspend my medical aid! My husband is diabetic and is on chronic insulin. I have been trying endlessly to have this matter resolved but I keep getting the same pathetic service! What do I have to do??? Can someone competent please assist me! I have absolutely had it now!