Bad service Metro politan

From January till today I'm fighting for my cash back at Metro politan I went to portshepstone branch for assist they took my new bank account and promise me to follow up about my cash back still today I did not receive my cash back I always went there there took my number and said they will make a follow up still no response I even contacted the head office and was informed them about my cash back still no response I even contacted portshepstone branch today they said they will get to me still . please help me helopeter bad service I received from metropolitan I'm very disappointed they don't treat they client good.