Mts — Plan Downgraded without consent - Legal Action

Hi, I took the MTS Ultra Wi-Fi dongle a few months back for the plan of 40GB Unlimited for 999. Last month however, the plan was downgraded to 30GB for the same price without my consent. Once the threshold is reached, the company is providing only 32kbps speed which was not mentioned in the initial contract. We are thinking about replacing the dongle unless something is changed and if no action is taken, we would move into legal action for receiving compensation.