I have migration acknowledgement number but when i have the number to check my status it has showing invalid number
While entering the number you should take care about the digits as well as if its alphanumeric then type the acknowledgement number as it is printed. I would recommend you if you are sure that you have entered the correct number and then also the output is given, I would recommend you to contact the authorities and just get it discussed they can provide you some info.
I hope this answer helps. All the very best for your future endeavors!