Refusal to reverse money

My name is Lillian and I am Capitec's client. I deposited money to the wrong number by mistake using cellphone banking. After realising my mistake I immediately went to Capitec bank and asked them to reverse the payment back to my account they refused and said I should contact the owner of the account I sent money to by mistake. I opened a case at the police station and have been to Capitec bank several times I cannot get help, I do not know what else I have to do. I am disappointed with the service I have been getting at my Capitec bank branch.