my current hopeless job

I'm an officer. I work as a purchsing staff for a waitan company placed in my country. I've worked here for nearly one year. But I still do donkey's works and I really feel I'm going to become a donkey. Because I don't know Chinese and my English is not good at all, I am not given any tasks to contact the suppliers and my boss.
All my work includes sending faxes and copies, sending SMS, making orders, checking samples, and I have to come to my colleague anytime she calls me and sit to take documents or do anytihng she asks for.  She's just my colleague but she acts as if she was my boss. Since she has worked longer than me, knows work better, and can do main work tasks,  so I don't prefer arguing with her. I think it's meaningless to discuss with a person, who never listens.