Soft locked in skate.

Me and my buddy started playing skate first day and I was in a party with him and we started doing challenges together but he was further then me in progression and we did the crew challenges in tri towers before I got the mission to do them and now it won't let me progress anymore and there seems to be no way to restart my save to just be able to progress again. Would like to be able to progress and earn rip chips but everytime I log on it says I've done the mission but it still say 0/2 and won't go to the next step. If there is anyway to get unstuck or be able to restart my save, I would love some input please and thank you