Today I swapped to Venthyr and not able to get past the first stage of the campaign to open all of the soulbinds and conduits.
It’s telling me to complete the “A Calling in Revendreth” although I don’t have the option to pick the quest up.
Also the “support” page offers no help when it comes to this topic and no option to speak to a GM about it.
So you are not able to see Rendle OR is it that he is not offering you the quest? We did have that Calling, but it expired today with daily reset. When did you do the Covenant swap?
I would suggest submitting a ‘Stuck on Quest’ ticket. Here is a direct link to it.
I swapped after the reset happened around 11am my time. Reset is around 1am.
He offered me the quest to go speak to someone about getting the calling but when I went to him he didn’t offer it to me after i spoke to him
There have been other reports of issues with this particular part of the Campaign if you have swapped Covenants according to comments on Wowhead.
Link: https://www.wowhead.com/quest=62691/a-calling-in-revendreth#comments
Hopefully the GM can get you sorted quickly. If your ticket does not resolve the issue initially, you can just click that your issue is not resolved at the bottom of the ticket and it will then be resubmitted and placed in a higher queue.