Mr. — not able schedule trips

Address:

Bangalore, Karnataka, 560096

While i want to schedule trips from my home to bangalore city station on 25/08/2018 at 21.15 hrs and on 26/08/2018 morning 05.15 hrs from chennai cenral rly stion to sristi greenwoods, nookkampakkam, i am getting an error message stating "you have an outstanding balance due to a credit card problem, please update your billing settings"
Even if i chage the billing settings to cash it shiows the above error.
I wanted to schedue 2 trips one today night and another tomorrow morinmgs. Please infaor me as gto what i have to do. This is urgent.