We just want to pay

We have started working overseas and asked absa to please change the debit order date to a later date. Due to this not happening the debit order bounced. We have tried on multiple occasions to email for banking details with our account number on it but no such luck. We are now being harassed daily but our attempts to pay go unnoticed? We need to have this dealt with over email as we can not make or take calls due to us being overseas. Please can we have this sorted.