De same tin happened 2 me

A voice mssg was send to me by this particular number +2392247300, telling me to call the number which i did , it was a voice of a lady that come up trying to pass a message , but the mssg was not too clear to me after abt two to three minutes i discovered all my credit was exhausted .Moreover! after some hours i tried agian in order to understand the kind of message she's trying to pass and the same thing happened again for the second time my credit was Exhausted like a MAGIC.

Pls i need an anwer and what will i do ?

The no sent me a voice mssg telling me to cal the no, and after calling a woman picked the cal but i didn't get what she was saying. After about 10sec all my credit just vanished.