AVG not recognising license number

AVG is not able to recognise my license number.
I've tried to uninstall but the Firewall could not be stopped during process.
Thanks for your help.

Hello James,
We understand how something like this can really try your patience.
To get this issue fixed, we request you to run AVG remover tool in your pc and then install AVG Internet Security back in your pc to get your issue fixed. To run AVG remover tool for AVG Antivirus please follow the below steps :
Please click on the below link to download remover tool
http://aa-download.avg.com/filedir/util/AVG_Remover.exe
Accept the license agreement and then choose AVG Product and remove it.

Hello James,
We understand how something like this can really try your patience.
To get this issue fixed, we request you to run AVG remover tool in your pc and then install AVG Internet Security back in your pc to get your issue fixed. To run AVG remover tool for AVG Antivirus please follow the below steps :
Please click on the below link to download remover tool
http://aa-download.avg.com/filedir/util/AVG_Remover.exe
Accept the license agreement and then choose AVG Product and remove it.

NOTE: Once the AVG Remover Tool has done with its process. Please go to the drive where you installed this tool and look for a folder named as "AVG Remover" and I request you to delete it manually.
To install AVG Internet Security please click on the following link http://files-download.avg.com/inst/mp/AVG_Internet_Security_742.exe​ download and install the file. Also the license number has been sent to your registered email id.
Please feel free to contact us for any further assistance. Have a great day, Aravind AVG Customer Care.