Constantly changing Debit Order Dates

Our challenge with Discovery Medical Aid is as follows:<br> <br> 1. Discovery changes debit order dates without notice<br> <br> 2. Discovery processes debit orders on dates which haven't been agreed to, thus having huge costs in returned debit orders.<br> <br> 3. Discovery constantly cancels/ places on hold / suspends our medical cover (due to returned debit orders mentioned above). Why when they're at fault??<br> <br> 4. Discovery does not communicate or respond to any queries whether telephonic nor in writing. It's been over a year of nightmares with the same issue.<br> <br> Discovery causes us mental illness, unnecessary financial burdens and inconvenience due to the ADMINISTRATIVE BUNGLES on behalf of discovery. Do we have any recourse ?