Everything is supposed to be done on the App but it is not working

What is wrong with the app?

This request was also sent to *** last night with no response

Last month it allowed me to take a photo of the kilos but did not want to calculate my cash back and know cashback received

Now it says my login details is wrong. I requested a password reset. When OTP is received the app doesn't want to accept it. I close the app the and opened it again and it allows me access without entering login details. There is no option to insert kilos and my to do list is empty although I received a reminder to update the app for my cash back.

I also received an email advising a new device is accessing the app, yet I have this phone for the last 5 years