Solved

Bought 10 engines for 7 Tokens. Not got engines, spent tokens.

What did you try to do?
Bought one of Shops daily deals, which had 10 engines for 7 tokens.

What happened instead?
Got deducted the 7 tokens and didn't get the engines. I had 7 engines before and have 7 engines now. I replaced an engine and it went to 6, refreshed just in case and still said 6.

Did the problem happen while using wi-fi, mobile data, or both?
Wi-fi

Did the bug happen in the app, on PC, or both?
PC

What operating system is your PC?
Windows 8.1

Which browser did you experience the problem in?
Chrome 91.0.4472.114

Can the bug be reproduced?
Don't know.

Additional comments:
Checked again, refreshed again and still have 6 engines :(

That is weird as it was an engine displayed, as I needed engines and not parts. I've gone back to the shop and it's the brake disc and I can purchase it again. 

So I don't think it's been solved.

He is from GB ??, so it might've been a mid-night glitch not updating his shop deals Jose ?