I’d say that this is a noisy machine but your neighbours are pretty safe.
The food processor attachment is intolerably loud just as a heads up.

For most mixing I rarely use high speed other than for whipping and haven’t found the sound worse than say a blender.

Hope that helps

Making bread was one of the main reasons I bought mine. I spent a lot of time looking for the answer to this question and in the end, the answer is that there is no wrong answer.

Generally speaking I would suggest mixing by hand (spoon) initially just to get everything together a little bit. Then start at a slow speed until you have a ball forming, from there turn it up to around 3-4 (relatively low-moderate speed) for up to 10min of kneeding.

If you go too quickly the dough will fling off the kneeding tool and will heat up affecting the gluten.

Bread is fairly temperamental and affected by lots of factors so just play around a bit with what I’ve suggest above, hope it helps.

Thank you very much for your response. That explains why my gluten was breaking down. I was following the same procedure as my kenwood 4.8l titanium chef not realizing this bowl is soo much bigger needing a diff technique

Get in touch with company,or get partner to try to release,I’ve found that my whisk attachment does not get to bottom of bowl can’t get it down

I'm in agreement with Pammy, that sounds like a mechanical problem with the latch.
Since the machine is brand new it will be covered under the initial manufactures warranty, I'd suggest cleaning it out and taking it back to the place of purchase. It's a hassle but they will often just replace it for you.