For any query/complaint you can call at 18002669520 or mail at fblnetcsupport [at] federalbank [dot] co [dot] in
You can also lodge your complaint online through this Portal .
Level 2:
If your query is still not resolved or you face any issues or rude behavior at the toll plaza then you can call National Highway Helpline No. at 1033 or mail at etc [dot] nodal [at] ihmcl [dot] com