Shocking service from FNB Investments team

My FNB fixed deposit matured this month, and in preparation for this I opened up a new account and placed a withdrawal notification on the old account for the funds to move on the new account. This was meant to happen on 15 June, when the funds in the old account matured. These instructions were placed on the FNB app, and were accepted and successfully placed on the app (no error messages received along the way). On 15 June, I checked my account to confirm that the investment was made, and I found that the old account was closed but the funds were not transferred to the new account. The funds were however transferred out of my accounts (and placed into some suspense account). This was due to some system error which prevented my funds from being transferred to the new fixed deposit account. Prior to this, the FNB Investments team did not reach out to me to amend my instruction - there was a lack of pro-activity. Even after notifying FNB of the error, I have now been asked to wait until next Tuesday to get my money deposited back into my account, with no benefit for the lost interest during this period. The FNB team has offered very poor service throughout the whole process, and have dragged their feet to transfer the funds back into my account, and are choosing to hide behind the process rather than help the customer. This despite shortcomings on the FNB app which should never have allowed the instruction to go through.