Hi Joybell.
The Thermoserver can go into the fridge with leftovers but is designed to keep food warm or cold on the bench. It should definitely not go in microwave, in oven or onto stove.
There is no drama is you want just a bit of the Thermoserver replaced at your own expense.
I got a base (the tray bit) for a customer recently and it was only $7.50.
If you have damaged the insulated bowl, just talk to your consultant because it would be pretty easily replaced, but is not covered by the warranty.
One more Thermoserver tip is to warm the bowl with boiling water before putting the warm food into it. Won't keep it hot much beyond two hours though.
Hope all is well and thanks for asking the question.