Please need opinion or advice: Repot Cattleyas, yes or no?

[SADE2020]

Good day!!

Yesterday I officially presented myself and with your permission I take the dare to make my first consultation, I hope not to bother, but this and another subject that I will ask separately overwhelms me, so here we go:

I bought these Cattleyas a few months ago in Autumn, since they arrived I have had to supervise them a lot, because they came from an open nursery, some with mini snails that I have been able to eradicate. The issue is that I do not have plants in these conditions, with such old medium or green mold.

My instinct is to repot them with new medium and a pot adapted to my environment, but the vendor told me "no repot need it". That was the only replay I got...

So, my doubts:

1) According to the photos here below, do you think these Cattleyas need repot?

Shared album - Sa De - Google Photos