[Prepaid Phone] How to recharge with thePay Cash?
This is thepay help desk. Answer is ..

You may transfer a lump sum in thePay Cash and use it to recharge.
Using thePay Cash will make recharging a lot easier. 

[Prepaid Phone1] Click ‘Mobile(Voice/Data)’ button.

[Prepaid Phone2] Click Prepaid Mobile Recharge (Voice/Data).

[Prepaid Phone3] Select Voice to recharge your sim and Data for internet.

[Prepaid Phone4] Select recharge amount.

[Prepaid Phone5] thePay Cash appears. Check the amount and simply click ‘Recharge’ button.

[Prepaid Phone6] Check the recharge details and press "OK".