Hey there Gordon! It sounds like there might be some confusion here. I checked into the subscription you purchased and the offers at that time, and the only thing I can find is an offer where you could get 3 months of Gold at 50% off OR 400 MSP if you added a 12 month prepaid code. Since you took advantage of the discount, you would not be eligible for those points.
I'm sorry for the confusion here. Please let me know if you have any further questions and I'll do my best to help you out. Thanks!