Not Informing customer

Can Best Med explain why do they increase your yearly premiums with out notifications? I haven't receive emails, i haven't receive a sms and all my details are 100% correct. Their must be some communication from them to us as their customers.

You increased my monthly debit order over R400 and create a chain reaction for my other debit order to unpaid. Who will pay those unpaid debit orders? Now im sitting with 2 companies debit orders that bounce plus 2 x R100 unpaid fee.

Reason: no notification