The battery of my Huawei P20 has blown up, after t...

The battery of my Huawei P20 has blown up, after two weeks the device was apparently already repaired. When receiving, the back cover was not glued. How can you forget something like that? Back to MobileTouch, I've been waiting for the device for over a month now, only the back cover has to be glued on ... incomprehensible, does that mean MobileTouch customer support?