If you haven't complied with the terms, which you say you haven't, for reasons you don't give I don't think you will have a claim.
The terms of nearly all insurance companies insist on being advised of a loss within 24 hours, so 48 is generous.
The terms are easily available on this site for you to read:
Once you have all the details you need to hand, making your claim could be as easy as a five minute phone call to O2 Insure.
To make a claim, you must contact O2 Customer Services within 48 hours of noticing your equipment is missing or within 14 days if your equipment has been damaged. All theft claims must be reported to the police within 48 hours, as you'll need a crime reference number to make your claim.
Where possible, loss claims for mobile phones will require a loss reference number from either the Police or relevant authority (i.e. Transport for London). If this isn't possible, make a note of the Police station where you reported your loss, along with the name and badge of the officer you spoke to.
Once we have registered your claim and you have provided all the details needed, you'll be transferred to O2 Insure who will process your claim. Please remember, your bills need to be paid up-to-date, otherwise your O2 Insure policy will lapse and you won't be able to make a claim.
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