What exactly have you tried to order? I've been ordering from McMaster both to a fairly small business and my personal home address with absolutely no issues for over 8 years.
Are you in the US? If you're trying to buy those tubes, are you trying to order very long lengths? UPS apparently has a limit of 108" total length, and a sum of 165" for length + "girth".
As for McMaster overall - I agree with some other sentiments here that they're great, though I do admit the "McMaster tax" (paying 10~200% what you could find the identical part somewhere else for) can be annoying at times, but is worth it when you want a reliable supplier with almost universally good quality products.
I would try the recommendation there of ensuring you have a business name on the order, or, contact their support - I've had to contact them a couple times and they were generally quite helpful.
Are you in the US? If you're trying to buy those tubes, are you trying to order very long lengths? UPS apparently has a limit of 108" total length, and a sum of 165" for length + "girth".
As for McMaster overall - I agree with some other sentiments here that they're great, though I do admit the "McMaster tax" (paying 10~200% what you could find the identical part somewhere else for) can be annoying at times, but is worth it when you want a reliable supplier with almost universally good quality products.
edit: Based on your reply to a sibling comment, I looked around, and found this thread that seems to reinforce your experience that McMaster shipping to Canada is...unreliable: https://www.chiefdelphi.com/t/mcmaster-carr-supplying-to-int...
I would try the recommendation there of ensuring you have a business name on the order, or, contact their support - I've had to contact them a couple times and they were generally quite helpful.
Good luck.