Help me with my iMessage and FaceTime!

I changed operator from MTS to Beeline. However, I kept the old phone number. Now I can not activate fatsetime and imessage. What do I do? Sms come as usual, calls are as usual, the internet is working, but can not be activated Imessage and Facetime. In the office of Beeline told me that the problem with Apple servers. An activation message goes from my iphone to the Apple server, but return no answer. Mobile slavery abolished in Russia recently, many companies have problems with this. Prefix 915 defined as MTS, but in actual fact I`m already Beeline user. What do I do?

PS. Sorry for English, it`s Google translate. =) Help me please!