I think the closest one to you is the Doha Main Centre which is in the D Ring Road in Al Hilal

You can also pay your bill through most of the banks in the Bank Street (Grand Hamad Street)

See the below link for more information

http://www.kahramaa.com.qa/NR/exeres/C260F057-E723-472F-9A01-C1344F6E2C7...