how to check my package consume

guys please i need some help here
first of all sorry for my poor english and sorry if i act noob but i'm new in these stuff
i bought tooway sat with Modem RM4100 and i install it by my self
the guy that sell me the sat gave me activation code and he said its 16GB package for 6 month
now every thing goes well and the net work very great
but what i need to know is :
1- how i know how much i consumed of my monthly package ?
2- how to know my ISP Provider and how to renew my package after 6 month
i bought the sat form A Guy and he left the country i cant contact him and i have no other information about him
i try to google the problem and contact already 2 companies they sell TooWay package and after they check my modem SN they told me to contact the dealer that i bought the sat form him
but i really dont know who is it
any advice where i have to start or what should i do ?
thank you in advance

well i already told ya i cant contact the guy who sold it to me
he is gone

any other suggestion please ?