Floor unfortunately deformed

Use the pan now been just over a year, and the coating is still great (of course, only worked with plastic spatula and wooden spoons). The high margin is absolutely practical, has very often helped me. The red dot work on my ceramic hob apparently not - no matter, no shortcoming. The handle is very easy to unscrew, if necessary times (Torx but also slot)

Only the floor has vaulted to the pan no longer lie flat on the cooktop. I find very unfortunate, but seems to happen at the most affordable pans. The roasting results are still good. Therefore, only one star deduction.

Update:
Now, after one and a half years, the coating on the thermal spot in the center diminishes slightly. Here is every now and then hang what. But can still be fairly easy to wipe again.