Cards Deemed Invalid after driver cancelled trip

Early hours of this morning i requested an Uber X, driver named Joseph. The driver called to say he was upstairs, i made my way up however it took a bit long and i called the driver to say i'm on my way and i apologise for taking so long as i was held up by the lift being very slow. The driver then cancelled the trip and upon requesting another ride i got an error stating my cards have been deemed invalid and i was left stranded. there is no customer care or service number to call for assistance. this has caused a major inconvenience and i am still unable to use my cards.