Call or email. I've found it easier to get in touch with most places by email. I'm sure they'll want to know about the problem and will do what they can to fix it although that might mean waiting until next year for a replacement.

Call, but...maybe you'll want to wait until you see the second flush? Many times the first flush of new roses, especially bareroots, don't look like the mature version.

Here is a link that might be useful: Heaven on Earth photos at Helpmefind.com

I took the advice and waited until the rose bloomed again. More petals this time but still not like the Heaven On Earth I have seen elsewhere. Could this be an accidental sport of Heaven? All but 2 of the canes withered away and I can only guess at what I have. It seems almost like but with too few petals and I wonder if the color is off as well. At least it has more than 5 or 6 petals this time around! What would you do.....keep waiting or ask for another plant now?

I'd take some pictures and email the rose grower. They should know what is normal for the rose when it is young. If they think it is HoE, then you might want to keep it and wait. Although if you don't like how it looks and it doesn't sound very healthy, then you might want to get another rose anyway. At the very least the grower will want to know that there is a potential problem and they can take a look at their own stock.