Hi John ,
Shark have a very good name,
I used,
https://www.dyno-chiptuningfiles.com/
cost was £120inc vat , I got the tuned file back in 1.5 hours after sending them my file
https://www.dyno-chiptuningfiles.com/ sponsor a ecu tuning forum I use and have a very good name on there,
always got back to me if I asked them anything,
send them a copy of the file from your car and ask them,
Dave