Capitec Bank

For the years I've been using Capitec I've noticed that they often have glitches when i do card payments. What happens is when i tap or insert the payment goes of on my side with sms notifications also relects on the Capitec banking app that the transaction was made but on the merchants side it doesn't reflect. Many times i was left stuck at the teller and at times i had to make that transaction twice and wait 24 hours to see if the money got reversed into my account or if the transaction did go through twice. Then i have to go claim my money back from the store. Capitec this is becoming annoying,i had this issue at three different stores already and if this persist I'd have to consider changing to another bank.