Discovery Bank App Malfunctioning

Yesterday I was paying my daughter's school fees using the Discovery Bank app as usual and for some weird reason that single transaction got generated 4 times. One payment was made but it went through 4 times and I didn't get any notifications for the other 3 payments. I noticed this immediately and contacted Discovery Bank and they were unable to reverse the funds which I find weird because the school uses a diff bank and I didn't do "Pay & Clear" so the funds were still at Discovery Bank. Not only were they unhelpful they went and blamed my Network for their App. They then told me that it will take 21 days to resolve the issue and an agent from Disputes will contact me asap... It's been over 24 hours and no one from Discovery Bank has contacted me! Very disappointed and I will be closing my account as soon as I get my money!!! Very ***********...