cancellation of application/petition


New Member
hello, i have a question and would appreciate some answers pls.
My Mom who lives in the US filed for us (myself and my sister) about 2013 ish when she became a citizen, the application was accepted and we were on the waiting list as usual.
Now for some reason we all lost track of the application only for her to receive an email a few days ago that petition has been cancelled.
my question is, is there anyway that that the cancellation can be petitioned.
pls Note Upon receiving this email, she drew our attention to having seen an earlier email a year ago seeking the petition to be cancelled, but she assumed it was scam.
May somebody educate me pls on the way forward.
do we have to start all over again. All we did at that time was the i130 application and it was accepted and we were waiting