Pathetic service from Old mutual

My husband has a life cover and an RA with Old mutual. On the 14 April 2020 we called ( the number given by old mutual for clients to call) and asked them to remove our banking details. We also then had the life policy cancelled and RA made paid up. We were told it had been done. This was not done though and Old mutual debated the account twice. This caused extra charges as due to the lockdown there was no pay therefore no money in the account. Never the less the bank charged us for returned debits. We sent through a letter stating the name of consultant and time and date of call. They claim there is no such person they can find. They have not responded to my emails but debited the account on the 29 May 2020 and again on the 2 June 2020. Extremely upset and disappointed. Old mutual is taking advantage of their clients during this pandemic and causing more problems for them. After cancelling the policy they still debited the account causing other debits to bounce back which causes us again as the bank puts on charges for returned debits, not to mention the other company whose debit returned. Old mutual is ......