Can anyone explain the best course of action, I've informed seller they'd be able to recover the BTC from their BCC wallet but they answered as if I hadn't done the mistake already, I'd like simple step by step guide how they can recover it to send to them.

On 5th October 2017 when Bitcoin cash still very new and little support was around I Sent BTC to a BCC/BCH address but it now seems that it's gone to an un-allocated BTC address.

If and When the identical BTC Receive address is created in the future by someones BTC wallet, will my Bitcoin go to their wallet or will it remain floating in cyber space?

This is my transaction https://blockchain.info/tx/0852a9a7f398017c508dc3eed0f54f231d3cc0679765647208e6374dca11989c?show_adv=true

it is showing unspent 12PYBy89CUJkoJyar48E2Shys7GBMY4CxJ - (Unspent) 3.20098107 BTC

This is the BCC/BCH address provided by seller : 12PYBy89CUJkoJyar48E2Shys7GBMY4CxJ

It's a long shot however if I can get confirmation from a developer of the Bitcoin network that it's impossible for the sent funds to arrive in a receive address created after funds were sent then I might be able to get back my original hard earned funds I bought them with.

Can anyone confirm these funds will never go to a newly created wallet/Receive address for me please?

Or

Will the BTC funds be in the BCC/BCH wallet receive address of the company I sent them to, just not visible because of wrong currency?

Any help much appreciated, Reward will be paid too for help leading to the return of my hard earned funds. It's about £10,500 GBP at time of sending so talking at least a £1000 for it's safe return, if you want more make me an offer to consider.