Do you have a local/reputable dealer? I would start there. Or maybe call the Company that built it.
I have a voyager and I had the same problem here but since the company had been bought out and they were not produced any more I was in a quandary . It was even hard to find somewhere to take it. The DH finally strapped a long 2x4 to the top and we "humped" it down the stairs and took it to someone who supposedly had been a dealer TWICE and each time it came back worse than it left. I finally called the company that bought out Hintenberg - the guy was great and I let my husband at it with the guys suggestions. Works fine now.
Best of luck -