You can try to block their number, and in future you can buy reserve prepaid number used only for registrations and ordering stuff.
I blocked a few different numbers Ledger numbers already... not sure if having a burner phone that I would never answer would be much different than just giving a fake phone number, which is what I'm leaning towards.
Various phone carriers have this feature. Essentially they register their phone number under the name "Ledger" with their carrier, and then the carrier pushes that to your device whenever you receive a call or text from them.
I found this - I think it applies to Android with default settings:
Caller ID by Google shows the names of companies and services with a Google My Business listing.
"Google My Business" listings are free AFAIK. Not sure what, if any, verification is done. Probably none judging by complaints like this:
Google Phone app caller ID and Spam protection feature shows competing local business name when placing calls to or receiving calls from our business land line.
Were you one of the allegedly only 9.500 users who had their full personal details leaked? Did you receive an email from Ledger informing you that you had all your details leaked?
I may have received an e-mail from them or may it wasn't them LOL. At this point I wouldn't trust them even if they send me a new device for free and definitely don't trust any e-mails from "Ledger".