DSTV/ Showmax issues

Every second month I get charged for Showmax, however I am a DSTV premium subscriber and should get the service for free. Then I have to contact DSTV to ask them to refund me, which they don't get right the first time you have to contact them again. Their response is that my showmax account is not connected through my DSTV account and that I should contact Showmax. Well I have contacted Showmax now and they have confirmed that I am connected through my DSTV account. Makes me wonder how many other customers get charged for Showmax when they shouldn't get charged but just don't check their bank statements. You would think that a company like this should be trying to keep their customers not chase them away, just saying...