Trying to stop debit orders

I have been unemployed for 4 months! i do not have monies in the account and i have been trying to stop my debit orders for 2 months but with no success! the Capitec app on the phone does not allow to stop debit orders anymore! the call centre cannot stop debit orders so i had to go into the store! i did, and the desk agent tells me she cannot stop the debit order!!! really??? the only way they can stop the debit order if the debit order goes through, and they reverse it at a fee of R35! you kidding me right!!!! Capitec takes so long to reply as debit orders are going off on 20 December!!! i thought Capitec had more sophisticated technology in place! i need for my debit orders to be stopped please with immediate effect!