Audi A3 Concert Car Audio

[AVAGO]

Hi
could someone please help me with the following.
I have a V reg Audi A3 that I purchased from my DAD. He had the car from new, after about 2 years the car Audio failed, It went into the Stealership and the unit was replaced, he was given a new code etc. Anyway years on the battery had to be disconnected and stereo lost its code, Hey no problem we have the code ( Not ) it didn't work, so I thought Ahhh maybe they didnt change the stereo and its the old code but alass No. If someone could help
These are the details on the stereo:
FA 05673
Model: 4B035186J
Ref No: CQ-LA 1623L
SN:20490
EU: A2 A3 TT 4B0035186J
Reg plate V (1999)
Many thanks for looking
AVAGO