HDFC Bank — mandate notification details

I received an sms notification on sep 20 stating, "dear customer, mandate reference no. _to birla sunlife insurance company pvt ltd with value rs. 87000 and frequency adho is received today (20/9/2017) for processing.in case of any issue, please get in touch with your branch.

I do not remember giving any such mandate. Checked with my agent of birla sunlife, who checked and confirmed, no such mandate gone from their side.

Help me to resolve, so as to save this amount.