Smart Shopper Card Nightmare

I have had a functioning smart shopper card for a number of years however towards the end of last year all of a sudden my card stopped working and was "not registered". After trying to register the card at the shop kiosk I had no luck with an error message showing. I was then instructed by shop staff to contact customer care, no luck there either as the agent informed me that an error was showing and she could not assist me and would escalate and they would contact me back, however a few days later I received an sms saying the issue was resolved but my card is still not working! The register card, replace card or block card functions through the whatsapp service do not work either, I get a "something is wrong" message and that is that. Essentially I am helpless hence my complaint here now. I have either had to beg other customers to use their smartshopper card or could simply not take advantage of the smartshopper savings because of this mess. I would really appreciate if someone can contact me and ensure this matter gets resolved. The bizarre thing is that the exact same situation is present with my wife's smartshopper card as well!