Unreliable App

Made a R75 airtime purchase via the Vodacom app this week which I did not receive. Made 2-3 other airtime purchases via my banking app as well and received the airtime the same time. I've made a couple of calls to Vodacom Customer service to query this but not getting any assistance. I mentioned to every agent I spoke to that the money was deducted from my account and can provide prove, but Im being told to wait as "there might be a delay on the system". Its now 3 ****en days and all they can say is that they can only see the transactions which I made via the banking app and not the one which was done via their app. Also ****en remove my number from your contract system. Its a PREPAID number. This causes a lot of **** any time I do an enquiry because your agents cannot assist me due to the fact that they cannot pick up any details. I then have to be transferred multiple times. No reference numbers are provided.