Sorry this has happened. Highly recommend no phone calls. Email. Then there is written accounts of all correspondence. Pretty gross customer service requesting YOU deliver the unit to them in the States. But poor customer service from some US companies is par for the course for Canadians.
There's no reason they shouldn't be doing 100% of the leg work. Picking up your unit, finding a certified (this is important) welding shop, giving them the repair specs, and returning your unit with an apology for the trouble. Be thankful your local RV shop didn't do the repair. Likely they don't have a certified welder on payroll and would hose any warranty you had left.
As a metal worker and weldor, that, to my eye, looks like a pretty pathetic piece of metal for what it's job is.
You should also read carefully your warranty fine print for your unit as sold in Canada. And also look into rules regarding warranty on products sold in your Prov.
Email the parent company. Shoot for the top. Include previous correspondence.
And post pic's and your story on every relevant social media outlet you can. Bad PR can be deadly and the only thing that gets some results sometimes. Sadly.
Keep us posted.
