Cork Fell Into The Bottle, Help Please

Hi, first post here and as you'll see I'm far from an expert!

I received as a gift a week ago a Glenlivet 15 year old French Oak Reserve. I might have had 2 or 3 drinks before tonight. So anyway, don't ask me how I managed to do that, but the cork broke in my hand and the other half fell in the bottle. I sealed it back with one of those long rubber stopper that you use with wine. I'll decant it tomorrow night in a nice carafe (I don't have it at home right now).

So, question is, what kind of impact does the cork have and will it ruin the bottle? I mean am I doing this thing right or should I not even bother and just try to get a refund at the shop?

thanks!