Hello Heidi,
I apologize for the inconvenience you experienced in this case.
I request you to please use AVG Remover tool to uninstall AVG program installed on your system.
Please use the below link to download AVG Remover tool:
http://aa-download.avg.com/filedir/util/AVG_Remover.exe
Please feel free to get back to us for further assistance.
Thank you.