Expired bank card - not replaced

I have a credit card that expired end of Jan and am still not in possession of a new card. Their excuse is they are moving to a new system yet at no point has anyone phoned me (I have phoned 5 times since mid January) or mailed me to tell me that I would be without a card for a period. How does this happen? I am surely not the only person with a card expiring end JAN - did they not have a plan? When speaking to the Customer Care Manager he agreed that I should just get a card from another bank - how scary is that!