I dealt with this several years ago. I found the charges on my bill and called to have them removed. It showed up the next month too. After speaking, at length, with the T-mobile rep it made sense. T-mobile allowed you to purchase apps through your account. But these companies would get your number and just start charging you. Apparently many people don't look at their bills and don't notice changes for a couple dollars. Particularly if the company name is worded to look like part of your bill. I asked them to disable being able to bill my account directly and the problem was solved.
I went through this several times with Verizon. I disabled all billing through my account, but apparently every time you get a new phone, change your rate plan, or a mouse farts, the option gets switched back on.
In many cases, such as my stepson's, they are aiming these services at kids, because they know they have trained well this generation of kids to not read the fine print. By texting "funny" to some number they can get a corny joke sent to their phone once a day and they don't even realize that it is costing $10 a week because they didn't read the fine print. Nevermind that kids are not able to enter legal contracts and are under no obligation to pay.
Basically, if the phones are offering these billing services, they need to be regulated under the same rules as a credit card, in addition to the regulations of the phone services. Basically, they are currently acting as a credit card without having to follow the same regulations. Since they are not acting as a mere facilitator, as a credit card company would, they feel no obligation to side with the consumer on a complaint. If a CC company sides with a consumer and reverses the charge, they make MORE money. If the phone company reverses the charge, they lose not just their 20-40% cut of the scam, but the entire amount, unless they have agreements with the scam companies that allow reversing the charges to them.