It sounds as though she needs to be taught how to play.
To some greys its a natural thing to others they need a little help along the way.
We have a room here for homemade toys, i understand you cant get hold of any, what about making some of your own for her? It sounds silly but play with the toys yourself in front of your grey, try and make it look really exciting, try and play games like peek a boo or if your grey feels comfortable on the floor a small ball might be fun.
Can you get hold of any pine nuts or pistachios? Im sorry I dont know exactly where you are and what is available, these are what I use with my greys.
I also use sugar snap peas and pomegranate seeds.
I have three greys and they are all so different, one plays more than the other, one talks more one is more lovable.
Each grey is different and it maybe that your grey may not be as curious and adventurous as some others will be. Take small steps and watch her personality develop.
You have not had her very long and it will take a while for her to gain your trust as well, this will come over time dont rush her.
Take a look around the many rooms we have here including the Nursery which may help with socialising your baby. Also the training and birdfood room will offer some good advice as well.
Good luck and welcome to the forum Tom.