Old Mutual terrible customer service

Old mutual has been deducting premiums on time every month for just over a year now since I changed my payments from PERSAL to debit order... And they have claimed that no payments were received for April, May and June and have have gone ahead to lapse the policy!!! They have ignored two emails, one providing proof of payment as well as an enquiry about them having done an investigation about the debits going off my husbands account that they "claim" they have not received. I went through this with them last year too when they refused to payout my uncle's funeral policy that I had with them. This is horrible customer service and I would honestly not recommend them to anyone! They're deducting money yet they Lapse my policy, so where is my money going to??? Who are the credit/debtors clerks that are not linking my payments to my policy?? I have now sent two emails, one containing the proof of payment (bank statements) and another enquiring if they have done their investigation, and I have heard NO response from them to date! I cannot call nor visit them because I no longer reside in South Africa, and I have indicated this to them in almost every email that I have sent to them! I am disgusted to say the least!