Monthly payment is increasing every month

I have a complaint against CLIENTEL . I joined a Funeral cover with them its about three years no if not more , the cover that i took is for me my spouse and my three kids for R150 per month , whats i notice in the past months my monthly premiun kept on increasing about R10 evert month I dont know why ? From that R150 i am now paying R220 , no one has contacted me and explain this change ,not even an sms nothing , and I also want know now that they keep on increasing my premium , are my Benefits and cover increasing ? But am concerned i need to know what is going on ? How much is it going up to? And why ? They just debit on my bank as they please and not the amount we agreed on.