Bad service

I tried to buy online using the Woolworths app as i had a R500 voucher that was expiring on the very same day as i was about to checkout and pay i was supposed to get a one time pin but the problem is that i was not receiving my one time pin message so i had to call to make sure that they had captured my number correctly and the lady i spoke to asked for my numbers so she can verify if they were captured correctly and she reassured me that everything is fine now i must go back to the app and remove my card and re-add it again it should work if not i must wait for 4days for it to be verified to my surprise im asking myself why is my card not linked and verified caused i linked it a month or two ago so i lost out on the voucher because of that stupidity i sent a email but still it took them two days to respond which is an automated email and they called me 5days after sending the email they could not reach me as i was at work and guess what they never tried to reach out to me again so ya im very disappointed with the service i got im planning to pay off my account and close it for good its not fair and worth it for me!