Absa Online banking not Working, auto delinking of device!

frustrated and stranded! I can’t log into my Absa Internet Banking or my Mobile app - it gives me a code that I should enter after entering my account number and pin code. When I enter the code it clears all the information and asks me to enter the same information again on my cellphone - on the mobile app and online, it gives me an error message reading \Invalid credentials entered. Re-enter the required logon information.\" and I keep getting a notification on the mobile app to link my phone, I have not changed phones and unsure how it will just automatically unlinked! I know that I'm entering the correct account and pin number so what could the problem be? I've tried resetting my pin it also does not allow me to do so as it keep saying sending authorisation to mobile app - I can’t get into the mobile app as it’s been delinked!!! I've tried creating a new account it does not allow me to do that either as it picks up that my ID number is already registered for internet banking. How does this happen?