POOR QUALITY BANK CARDS

I am not sure what is happening regarding Fnb Debit /Credit cards. You use your card for awhile then all of a sudden the ATM machine does not accept the Debit card, tried 2 different ATMs on Saturday . The card does work when purchasing goods from a store. I have received 3 Credit cards this year due to the Card not been Valid and no error message at the Tollgates. The 3rd card worked at the tollgate a few times then on Wednesday it was once again not accepted...No Error Message. It is as if I gave them a piece of plastic to pay. We do not always have Cash due to the high crime rate yet by the looks of it the BANK CARDS DON'T WORK EITHER.