No google apps working on my 3G net but working fine on my college wifi only .Don't know why?

Few days ago, i was trying some proxy and VPN apps like Drony and many more... so that i can unblock the internet served by college WiFi (Cyberoam security). but after some days, a strange problem occurred , None of the Google apps like Google play etc. were working on my 3G reliance network.. also i tried at some other networks also..but they didn't worked.
The thing is that they only work on my college WiFi and nowhere else..
i.e if i am at home ,i can not open play store or Gmail app..

now my friends are using Psiphon to unblock the college WiFi , But when i use Psiphon ,then it blocks all the net... that is i can not even use my browsers to search anything... no play store ,no Google app ,nothing except COC and Whatsapp.
with psiphon ,i can send and receive messages on whatsapp but cant download pics vids etc
but yeah , with Psiphon i am able to play Clash of clans on college WiFi...which was not working on college WiFi alone....
i also cannot sync my COC progress with Google ...as on my 3G network ,Google apps doesn't work
and the game doesn't work on college WiFi
and with WiFi and Psiphon ,again all the Google apps stop working...
I have tried factory resetting ...nothing worked..
PLEASE HELP....
device - Gionee P2 4.2.2 jellybean