Bad service by Old mutual

I cant belong how bad old mutual’s service is. I went to the branch in March to enquire after someone told me my policy will increase and i said it shouldn’t increase. 22 July you deducted more than the agreed installment i immediately emailed old mutual to cancel the increment. 13 August i was told my query was emailed to the relevant person to cancel it. Today they deducted the same amount as last month such bad service. I want to cancel this i don’t have time to go branch