Etsy.app.link

I bought a couple of 3d prints from an etsy buyer and they came promptly and were perfect.
I was so pleased when i had painted them, and they were very professional looking paint ups i wanted to help the seller by sending him the pictures as he didnt have examples of painted 3d prints of the model i chose.
Could i get a message with multiple attached photos through? No
Could i send a single photo attached through? No
Could i send a simple text? No
I installed the etsy app.
Could i register on it? No
Could i just use the app without registering or simply do anything with it? No

So after attempting at least 20 times to send the photos in various ways, via 2 seperate google accounts or facebook, tried using wireless linked phone, turned off wireless and used mobile data
Nothing

I wonder how many people out there, potential customers, potential etsy users etc have had similar terrible experience.
Im a very experienced pc user, i know my tech, i build pc's and can troyble shoot a thousand horrendous software glitches. I know a lot about what causes problems that arent always well known (such as being on a wireless network vs a mobile data link)
Etsy flumuxed me. Gave up.
That small business owner loses out on a potential great review, free example photos (by a professional artist, i am a graphic designer by trade, hobby miniature painter) for their site. It would help them sell the product im 100% sure of it. I wanted to help the guy out as he was such a polite and efficient seller.
Etsy website, and even the etsy app let this guy down. And me for that matter.