In order to disable any service, you need to set a numeric password of 4 to 6 digits on the SIM card. This can be done using the USSD command *111*25# and call the number 1115 and follow the instructions of the informant.
Then you need to go to the official page of MTS. Top right you will see the tab "Internet Assistant", click on it.
Before you should appear a window where you will need to enter your phone number, as shown on the sample, the password you specified and press "Enter".
On the next page in paragraph "Rates, services and discounts" will be all connected services on your SIM card. To disable you need in front of services click on "disable".
Next, a window will open with the confirmation to disconnect the service, if you still want, then click "Disable services". After that, the services you have selected will be disabled.
Also disable the connected service call the customer service center on number 0890. A call to subscribers of MTS free.