PATHETIC SERVICE

I am quite livid with the service I received. I changed my account form Std Bank to Capitec and when I did change my account the first the debit order did not go though so I went into Capitec and made sure they had my correct details which was January. I received a very disturbing email saying that they din not receive payment and there fore I am in bridge of my contract. I sent the proof last month and no response from them . I sent another messages this morning and still no response. What more must I do