Gold card went from valid to invalid for no reason

I have been using my Gold card for the last three years with no issues. This morning when I tried to load additional bus trips the card machine rejected my card and stated that the card is invalid. I went to one of the cashiers to explain that I have money in my card and the card has problems. The over the counter cashier took my card and scanned it and said I have to buy another card because my card is damaged. He gave me some forms to complete for a refund and I did not budget for all these additional fees like buying another gold card when I have money in my card and its not my fault that the self help machine infected my card. Because the teller insinuated that I placed my card next to my cellphone which is something I don't do because my card is kept in my purse while the phone sits in another compartment.<br> <br> The unfortunate part is that I have a card that has money and I had to buy another card and had to load additional trips to this new card. I have no guarantee that my funds will be reimbursed on my new card. Its such an inconvenience which led me to losing my train and wasted unnecessary time. I have to wait for my query to be investigated and I feel let down.