Urban Company — plumbing service - overcharged

Address:

Bangalore, Karnataka, 560071

Hi team,

I had booked for the first time through urban clap for a plumbing service on sunday 3rd september 5-6 p. M. (Email id eliza. P.[protected]@gmail.com).
The service was ok. But i was charged extra 150 rs apart from what was shown in the online payment. The service provider asked me to make the online payment of 250 and took extra 150 as cash for which no bill was provided. The work was very little and it hardly took 10-15 min. No new products were used to repair.
Kindly take proper action on this and provide explanation on the extra 150. Or refund the money