Dear Sir if my sponsor didn't cancel my visa so...

Thanks for joining and trusting us, much appreciated!

We would like to inform you that if you mean the employer, then you have to file a complaint in the Ministry of Human Resources and Emiratisation and clarify the reasons of the complaint and attach the documents that prove your complaint. The labor office will hear the employer, then they will decide and issue the verdict or refer it to the labor court.
Note that you can only travel with the approval of his sponsor

 you shall inquire through the Ministry of Human Resources and Emiratisation website:

Labor complaint