Oh that is really frustrating my sympathies to you...

When a bit on my pram broke (not the same brand as your pram, it's a cheap Valco thing), I emailed the company about it. They told me to take it back to the shop where I bought it (Babies Galore) and they'll deal with the repair issues from there. So I did that and the shop offered me a courtesy pram. It wasn't anything super-doper but it sure was better than not having a pram at all. My pram got sent from Sydney to Melbourne, fixed and sent back all within a week. All within warranty.

Can you ask them about a courtesy pram while the issues with you pram are being sorted out? Good luck...