Discovery Health at it AGAIN

In April 2015 I changed Employer. Apparently the Employers broker send a letter of withdrawel to Discovery. Discovery de-activates my membership. In May 2015 I needed proof-of-medical-aid for my new Employer. Upon asking for this I was told (via phone) that my account is de-activated. I explained that I am now paying my medical aid privately. The consultant gave me Discovery's banking details - I paid my arrears. I phoned again after and they confirmed that my account is active and they send me the proof-of-medical-Aid. Soon after my medical savings ran out and I didnt use my medical aid until November 2015 when we needed an authorisation number for an operation for my daughter. I was then told that my account is inactive although I have been paying every month since May. Nobody said the payments had to be via debit order. Discovery now wants to pay back the money I paid and I am without medical aid - has been unknowingly for the passed 6 months. No communication from them. They accepted the letter from the broker without informing me. Even the money they wat to refund is way less that what I paid minus owing on the savings. All this after more than 10 years with Discovery.