Debit Order / Salary Switch over

I had opened an account with Fnb in December 2015, and was told that they would do all my debit order switching over and they would contact my employer for salary switch over as well. its now 2 months later and all my debits have not been moved over as yet. my salary still went into my old account. one of my highest debits which is my Vehicle finance came of my new FNB account when there was no funds in this account, and my debit got returned unsuccessful, I then had to transfer money from my old account to the new one, i also did a sim swap on my cellphone for in contact details and cellphone banking and they sent me an sms saying that they will give me R400 of airtime and 1.3 gigs of data for switching over, which up until now has not yet happened. FNB is not living up to their promises......please assist