BSNL — internate service is not available at my office

Address:

Ahmedabad, Gujarat

i have bsnl mobile no.[protected].iam using its internate service for one year & it was working fine.so i recharge inernate pack for 1 year.after working for few days now it is not working at my office for last 7 days though its working in other area but as i work for whole day at my office it is of no use to me.my office at narol which is in ahmedabad.i have complained it on bsnl call centre for 3 times but it did not help.please help me and resolve my problem