[charliebub]

Hi, I have had similar problems with after-sales attempts to contact ereader.store via e-mail - it's very frustrating indeed.

If you 'do a search' (Google) simply on the address of ereader.store (copied from the bottom of their website page) you'll get results that include a direct 'phone number to them in Germany.
The number has a + sign at the start - simply replace this with two zeros to give the complete number.
The fellow's name is Waldemar (pronounced Valdemar I think...) and by telephone is easy to get hold of, as long as he's not at a show etc.

I got in touch several times, first attempt, to speak directly to him.

e-mail-wise he's a bit of a disaster to contact - but by telephone I have had repeated success. This may be a better way to go for you?

Here's my search result, I hope it helps...