If it’s an S7 TDI it will be an 8 speed Tiptronic box. These can easily handle the torque. I check it’s in dynamic mode, etc. ZF-8 boxes have a service kit, so I’d be inclined to do that first before you go anywhere near a remap. Audi will tell you it’s sealed for life, but do it 60-80k miles. I follow a few companies, so Decimal Tenths are Newcastle based, or Darkside Developments in Barnsley. Probably the only companies I’d entrust the work too. They are both VAG specialists. For the Tiptronic service, then Mackie Transmissions, Glasgow.