Renault scenic radio code :-(?

I put my car in a garage and after £238 of work i got home and the radio is asking for a code, since ive only had the car 4wks and got no manuals i have no code and the garage want to charge me again to get the code, somebody said to try on here so any help would be greatly appreciated :-) the details on the tag on the radio (took me 1 1/2 hrs to get it out lol) are:

Model no: 22DC259/62P
TOF339
RN259F10256669
PROD NO: FD0501150256669
7700434424TF339

Thank you for any help :-)