Discount Benefits / Global Service Group Checking account RIPPED OFF! n/a Texas

My elderly Mother's checking account has had two completely unauthorized withdrawls for $337 each made over the last 45 days from "Discount Benefits" - the cancelled checks refer to Global Service Group and both were cashed in Texas. We went to her bank (PNC) to dispute the transactions. They told us they've seen this same scam before, but could not answer our questions as to why this was allowed to occur not just once but twice, or if they could take any action to prevent a reoccurence.
Only suggestion the bank could offer is to cancel the account and open a new one - which if your elderly and have all your direct deposits and bills paid out of one primary account is a giant P.I.A. - not to mention a lot of work and hassle.
Filled out a bunch of forms and were told we have a "decent" chance to recover the funds (wow - just filled with confidence) - but time will tell. Also planning to file a police report for all the good that will do. Looking on the scam sites these folks have been ripping people off for some time now, and it doesn't seem like anyone can put a stop to it. Because it's not credit card fraud it seems to get treated completely different and even the bankers seem unclear on how to handle this.
The bank's theory is they stole her checking account number and then called her and asked a totally innocent question - like stating her name and then asking "is that your name ma'am?" - to which any normal person will reply "yes" - then they hang up. Somehow (and trust me - this is the really gauling part) they can use that one "yes" as the basis for a verbal contract, create a fake electronic check, and submit to the bank. I guess then they leave it on auto pilot and hope the sucker doesn't catch on. They didn't even bother to use a different check number the second time - both withdrawls used the exact same check number! The bank is foolish to not have caught this, especially when they immediately recognized the name of the company when we went to dispute the charges. How can this activity continue to go unchallenged?
KPR412
Pittsburgh, PA