I use the Nux mighty plug too, it’s by far the best bit of kit I’ve bought in a long time for playing along with anything on my iPad or phone, there’s a thread on it if you wanted to have a read up david
Most of mine are 10 or over 20 years old but I do have a few basses with recent ones on and they are fine, something doesn’t sound right about those, have you contacted labella
The way I see it is ,if the money went to a different account to what was typed in then someone has been hacked (unlikely) or it’s a bank error which they are not admitting to
Also before you send the money my bank says that it’s found a match or not, if it goes somewhere else after that then that’s something beyond your control I would have thought
How does that even work, you enter a name, account number and sort code and confirm , then the money goes to a completely different person , could it be a bank error ?