Miles Booster

Can anyone tell me how long miles booster miles have taken to be credited to your account?

I am getting worried as I have reward seats on hold til weds and was told by FC on the phone the booster miles would take 24-36 hours but the T&Cs say 72 hours. I could buy the miles I need but I don't want to double up the cost if I don't have to.

I did miles booster on this trip ( it was a full reward flight) and the miles posted the day before I flew.

I've a feeling the last tIme I did it on a "normal" flight, you flew the first sector and they posted although could be wrong

David

Sorry, I should have been clearer inmy original post - I've boosted miles on a flight I took back in July. I'm now sitting here waiting for them to come through so we can complete on a reward trip to BGI in Economy (out)/UC (back)