Replace glass top

hi i have had a glass table for a while now and it was scratched very bad so i rang up my insurance company to replace the glass and they said they would and fit it aswell. But just recently i am having problems to get them motivated to fit it. Is it an easy job to do and how is the glass table top stuck to the rest of the table is it with glue or somthing else any help would be appriciated thank you.

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