Old Mutual bully and ****mers

Old Mutual is a big bully and a **** I canceled my policies with old mutual and have been calling them for two month now requesting proof of cancelation letters and every time i call i get to be told a lie an empty promise that they will email the Proof of Cancelations... I feel like they are holding me hostage and treating me unfairly as i need the letters to move to other providers they are keeping my documents intentionally to destroy and frustrate me and that will cost me cos i cannot get cover from anywhere else without those letters from them