Bad service

I have ordered a meal using Mr D Food app from August 2020 using the card payment for 3times different month, the card that I used was a nedbank savings card that falls under my 2year old son. Iam leying this complain because on the 13th of November 2020 I deposited R270 into the card since I hardly use it, what surprised me is that when I check the balance after deposit I was left with R149,76 which I didnt understand why the balance was like this because before the card wasn't charging anything on any payment or withdrawals and why should the bank charge me a lot of money like this. I went to the branch the following day 14th of November 2020. The lady who assisted asked why I'm I abusing the card's child because the card is working each and every after a day sometime 2 or 3days which I wasn't aware of coz the was no notification into my phone that someone is using the card. She even show me on the screen that around 20h40 same day I deposited the money the card was used to purchase something and they using absa verifone, even at my bank statement it is appearing. On the 18th November 2020 I phoned the Mr D Food head office on *** and they say they will lay a complain into their finance department. Iam highly disappointed about this service and it is obvious that the person who was ******** my card is a person who's got the information , and meaning it is not safe to order online on the app using the card payment. It is really frustrating and and disgusting I will never ever use the app or to recommend someone because people are taking advantage that they've got our details.