Should I sposta to another company?

As this has been senza risposta for 5months i'm very interested to know what te have decided on your own terms. Have te stuck to your old job o found a new one?
As for your original domanda there are many aspects that could be why te have not been promoted o moved to a different department when te have expressed interest. The most positive of these is that te are just too good at your job. Many companies see their work as pieces of a clock, when things are working just fine and as it should, they like to leave things as they are.
The other più depressing aspect could be that te are just not qualified enough (on paper) o your boss(es) think te are just not capapble,
As a very up-front person, i always ask if there are any comments, tips o even some concerns from my employer about my performance every so often. When i started my new job that was monthly, which has now been changed to 6monthly if yearly as i have been with my company for 4years now. That gives my employer a chance to pick up on my best and worst and also gives me insight to what i can improve on.
There is no risk in asking for an assessment, it shows your are serious about your work productivity but orso in mind te must take what they say seriously and if any areas do need improving take steps to actually improve them .
It could also be worth talking to whoever is in charge of training in your office/department to see if te can further your education in the company o learn new skills to give te that boost into promotion.
Good Luck.

Ask .
Why u was overlooked.
The worst they will fuoco u.
U r worthy.
But do your own homework.
Go see the ragno in the web.
Best approach to survive and understand.
But stay calm. Always.
Good luck.