I took Honda Jazz for rent. But due to nonavailability they provided me Honda city. I had similar experience with Myles before too. One week before they called and updated the unavailability, and later upgraded and provided me another variant car. Since they upgraded, this didn’t trouble me.
The car was in really good condition. Well maintained. Fuel was not full tank. The behavior of delivery representative was really good. You can try speaking to them and check whether they can do anything on speed limit.
When returned the car, since no accident had happened they initiated the refund then and there and I received it within 3-4 days.
PS: If you are travelling to Goa with rented car, make sure you take permit from Goa RTO. Goan police even if you ask will suggest not to take. But trouble begins once you enter Goa. So get into GOA RTO and obtain permit which cost you 250.
Thanks
Neeraj