Bad customer service ..Old Mutual account

I have received a notification of a online transaction pending and an old mutual consultant immediately called me to state there isan online transaction and I told her to stop it should not go through and she told me it had not gone through and upon checking my statement realised the transaction went through. Another transaction occured about 2 weeks later and immediately went to a branch and was advised to complete a dispute form 3 days later received email from a Carmelita Solomons from head office but I lost that R3000 and I am closing the entire account because I trusted them with my money instead they are protecting a **** because this transaction is apparently an overseas transaction which I have never accessed