FNB system change caused an error on my homeland account

I have been unable to pay money into my homeland account for 3 weeks, this means I will be charged interest I would have liked to avoid. FNB says this error is due to them migrating my account, so it's their fault and they accept this but have not fixed the issue in the three weeks we've been having this discussion. I asked if there was another way to make payment and their suggestion is to go to a branch! During covid I am not going to risk going out to a bank and all because they caused this issue. Really disappointed in how slow FNB is oaths matter.