Got the same problem but the numbers were different. I got charged 3 different times all within the same day which is today for a total of 85$ in total. i just send in a ticket and a VM asking them to get my money back. now how do you avoid this? first when you call them make sure you tell them to block your card number so if anyone tries to use your card on their platform it will be automatically rejected. second of all everyone needs to know they are not fraud you. you have to keep in mind that yes games are usually 19.99 and so on and usually having 60 flat charges are unusual for games. BUT you STEAM HAS GAMES THAT HAVE IN GAME CURRENCY THAT YOU CAN BUY THAT USUALLY ROUND UP OR DOWN TO HAVE A FLAT RATE! meaning your card information was probably stolen from a weblink,malware,store,atm and used to buy either a GAME(usually has $XX.99 and etc) or IN GAME CURRENCY(usually a flat rate or price $30 or etc) so keep in mind that steam is not sucking you of your money and its the people who have taken your info.
You can get your information stole by -opening a weblink -making purchases to a sketchy place -ATM (can get a swiper on them that scans your info! watch out for atms that are in places that are not banks) -viruses(MALWARE) CLEAN YOUR COMPUTER USE MALWAREBYTES
How to get your money back? -CONTACT STEAM VIA PHONE NUMBER OR INPLATFORM TICKETS -CONTACT YOUR BANK UNDER FRAUD
How to avoid this from happening again. -watch where you buy things either from online or in person at a store -never save your card info! even on trusted stores like amazon(people can hack your computer from far away and get access to everything) -watch where you connect wifi (coffee stores and restaurants. people will wait to send you viruses via WIFI)(USE A VPN) -ask VALVE/STEAM to block your old/new card from ever being used.(if someone tries to use your card again it will be rejected because its been blocked by steam) -add permission everytime you or someone tries to make a purchase online have the power to deny or accept it.
USEFUL LINKS malware protection: https://www.malwarebytes.com/ (use freetrial) STEAM contact info: 425-889-9642 (phone # toll free) https://help.steampowered.com/en/ (their website for support)
so in the end keep in mind that steam is NOT stealing your money. just because games usually are $49.99 and so on it does not mean they are stealing from you because in game purchases are flat rates like $40 or $100 and so on. and what are in game purchases? its like in game money or bundles that get people ahead of the game from other players or skins that make them look cool. so I REPEAT STEAM IS NOT STEALING FROM YOU. THE PEOPLE WITH YOUR CARD INFO ARE! STEAM ARE VERY SERIOUS WITH FRAUD SO CONTACT THEM
P.S. contact steam first because they will give your money back without any paper work and so on and then call your bank for a new card so that you can avoid all the paperwork . UNLESS YOU WANNA TRY TO GET THE GUY WHO STOLE YOUR INFO DESTROYED(meaning call the bank and have the police on his arse) :)