Experts help about Talku

Hello Android Experts, M new here,
I need ur help,
I have installed Talku,
And i need credit to make call , is there any procedure to get credit free from play store or any other method via modding app,
I tried freedom but failed, I dnt know how to use lucky patcher or other modding apps.
Plz experts do something to get free credits,

Thanx in advance.

Waiting for your response,