Pretty disappointed 9

I do not know if it's me that takes me wrong, but I can not get close to the end the thermos. When I drink my drink escapes through the joint between the lid and the container.
Moreover, this may be due to the novelty of the product (yesterday received), but the opening and closing is far from easy, I have to take a towel to open because I can not with bare hands, and vice versa to close, and yet, it still leaks, and I'm not that weak. Inability to contact the seller, I find no way to ask him questions about his product.
Other than that, the heat is very well preserved, despite the poor closure, which is rather a plus. To test with the cold, but if it continues to leak, I do not know if I will continue to serve me ... To see if I can get close to avoid leaks ...