POOR CUSTOMER SERVICE

I've been solving the same issue every month in regards to my bank everytime i swipe my bank card it tells me it declined whilst i have money in my account ,i dont understand why i always have to go back to the bank each and every month for the same isssue,i then call your call center iv been holding for more than 15 minutes no one has assisted me,ive called a diffrent number for complaints they answer and tell m ive called the wrong department like *** i need assistance in regards to this,useless bank im switching bank ive been with ABSA for so long but this is unacceptable.