Singer thread issue

I purchased a Singer 6160 Brilliance sewing machine, and it hasn’t even been a year, yet it constantly malfunctions. It ...won’t sew even two simple fabric layers without issues. Every time I try to use it, either the bobbin tension or the thread tension gets messed up. I already took it to service on...

I purchased a Singer 6160 Brilliance sewing machine in 2023, and despite being under warranty, it has never properly sew...n buttonholes. Every time I try, the thread bunches up underneath, making the feature completely unusable. I sent it to the service center, but even after getting it back, the prob...