No exclusions on policy but wont approve claim

Good day<br> <br> I phoned medihelp to get pre auth for a operation in december.<br> <br> They said they must investigate first for non disclosure!!!!<br> I have got no exclusion or any condition that has been excluded on my policy so how come must i wait .there no waiting period or anything on my policies.<br> <br> Typical medical aid ,you must pay every month but can never claim otherwise there is a problem.<br> <br> Worst service ever and bad attitudes aswell