Sainsburys Smartshop app - can't log-in

I got a Nectar card account. Sainsbury's Online Grocery account both with same email address but different passwords.
I've downloaded the Sainsbury's Smartshop to my iphone but cannot login, it constantly tells me my email add or password is incorrect.
Tried scanning my nectar card, tried manually inserting details to login and both passwords.
Tried creating a new account, but using the nectar card number. It tells me its already in use. Even tried removing the app and reinstalling.
Sainsburys website is a waste, cannot find any link or email add to ask for any help for Smartshop.
Anyone know whats going wrong or where to get help.


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