Bengaluru Metro Rail Corporation [bmrcl] — Online balance update claim

I am using one city one card which I borught in chennai, whenever I try to recharge it in any metro stations in banglore, I am unable to recharge it and the staff members always said that they are unable to recharge the card stating that there is bank server problem all the time for past 4 months. I am even not able to claim online balance update from the machines in the customer care in the metro stations.