RCS card rejected at Cashbuild after working before

According to the RCS website RVS cards are welcomed and accepted at Cashbuild. And indeed I used to use my RCS Game My store card regularly at the shop. Some time back the store got new speed points and since then my Game card keeps rejecting. Strangely enough my RCS Edgar's card stil works. I have enquired with RCS and they assured me that all Cashbuild indeed is registered on the RCS group and my card should work. They also checked and confirmed there's nothing wrong with my card or pin. I use the card regularly at Builders Warehouse, Game, Makro, Checkers etc. Only the local Cashbuild doesn't accept my card.

I have tried to take the matter up with the management but they agree that they are affiliated to RCS but have no idea why my card is not working.

When I swipe my card it gives options Credit or Saving account and no option for my pin. Whenever I tried to use this card at Cashbuild my card also then gets blocked and I must recent the pin to use it at all the other stores.

This causes inconvenience and I really can't understand why it used to work but not anymore (since they changed speed points apparently).

I can only assume there must be some setting on the new speed points that would allow RCS cards

Can you please look into this matter ASAP?

Thanks