Delhi Police — wrong challan for overspeeding

Wrong challan of overspeeding
I have been issued an e-challan (Notice no. 21608571 & vehicle no. Dl 8caw 3093) on[protected] at 08:55hrs for overspeeding for amount of rs 400/- at carriageway from sarai kale khan to akshardham near just after yamuna bridge towards ring road.. But, the picture clearly shows that my speed was 68 kmph and boards on the same road shows that speed limit is 70kmph.

I would like to request the concerned authorities to look into the matter and justify and withdraw my e-challan notice.

Regards,
Virender mahajan
[protected]