How to repair snapped coolant drain plug

hi everyone.

I've had my disco 2 td5 for around a month now and decided to save myself a few quid and drain the coolant and put fresh in but ended up shearing the drain plug.

The bolt did not even move and I hit the wrench with a hammer to loosen and the whole thing snapped off leaving the bolt still Firmly stuck and a hole in the coolant pipe.

I'm now in need of Worthing this problem but I don't have welding gear and no equipment.

Are there any methods or glues I could use please guys.

I'm at wits end

Drill and use helicoil

Chemical metal or similar will set underwater, not a proper fix but may get you going. Try not to let any get into the waterways though.