Enter *111*12# in the standby mode of the mobile phone and press send call. Disable chat MTS package from the menu of services then your number will receive a TEXT message informing you of the acceptance of the application. After a while you will also get a message about disabling services.
Go to "Internet assistant" on the page the official website of MTS. If you do not have a password to enter the system, create it by performing the suggested actions page (on your confirmation). Open a list of connected services and uncheck the "chat pack". This menu can also be used for management and other services provided by the operator.
Take advantage of the personal Cabinet on the website of the operator to control the connected services to you or check with their operator. MTS often connect certain services without the consent of the subscribers, as initially it is free of charge, but after some time the operator begins to take the monthly fee for their use.