IDFC Bank — Fast tag

Address:

Ghaziabad

Hi team,
I m using idfc first bank fast tag. seriously idfc services are worst. 1st tat time is very long. my problem is that whenever I used this tag for journey after journey my balance went in negative or show debit adjustment for total last recharged that I used in that journey. currently my balance in negative amount of almost 1200rs. this was happened with me 4 time. pls help me resolve this issue. problem is from idfc side bt they suggest change your tag may be it's a tag of truck or big vehicle. in this case idfc change my fast tag from his side but not they charged 100rs from customer to replace the tag.