Couriers are service providers, it always pays to be nice to service providers, I chat with quite a few of the ones we have at work and they will bend the rules to help me out. I don't get left off their list as they ran out of time as I get looked on favourably (I'd like to think anyway) but either way I've not had bad experiences so I try and attribute it to a karmic response.
Glad your gift arrived anyway Tim

Now why haven't you done those tasks yet? chop chop!