chronic medication

good day normally I receive my medication via medipost and collect them at the nearest pep store, normally i receive sms with pin to inform me the medication has been dispatched and i have to collect them. Yesterday I decided to contact medipost to inform them i haven't received my medication and SMS which was last repeat before i submit the new prescription. The lady indicated that the parcel was sent back to them but she will check and call me back. today i received a call from them indicating that the parcel has been destroyed, my concern is that they have claimed on the medical and am doing to forfeit that last pack of medication as is not my fault that i did get an sms from them and they indicate they try to contact me without luck. so am concern