Benefits Suspended UNFAIRLY after premium has been paid

I've been with Medshield since January 2022. Last month I requested to add my parent as a dependent and his benefits were supposed to start November because he has a three month waiting period. I on the other hand decided to terminate my account but my parent wants to continue with medshield as a separate account and would like to start his membership on 1st September 2022. I know that termination of membership is done 30 days in advance and therefore I paid for August because I had not requested termination earlier in July, but Medshield is refusing to cover me for this month because my dependent's membership was not paid despite me explaining that my parent wants to have his own account and start his membership in September. If I can cancel my account as a separate person then why can't I pay as a separate person. It doesn't make sense that only when am paying the profile is treated as one profile despite the fact that the premium differs. Me and my dependent cannot be treated as one person because if that is the case then both of our accounts should be terminated or I should get a reimbur*****t since Medshield doesn't want to cover me.