Mini Sewing Machine — mini sewing machine, the thread is not coming up

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Chennai, Tamil Nadu, 600119

Hi,

I bought mini sewing machine, but the thread is not coming while i am trying to bring the thread from lower bobbin. Machine has been took to the nearest repair shop and sked them to repair, but they said they are not sure about the problem, it seems to be a small issue but not sure how to resolve, l. Initially it worked fine. I think it will not take much time to resolve. Could you guys please help in getting the problem resolved. At least let me know how to resolve it.

Thanks in advance