Hmmm sad to hear your experience with him. It's one of the major failures a business can do when they have too many customers not to answer them all in a timely manner.
the Ledger hardware wallet together with any other hardware wallet is the safest place to store your cryptos. But as private person only holding cryptos you don't pay tax in Germany if you hold them for a year.
I have seen a few people on OCT offering such service @MichaelUniq is one of them but there are 3 or 4 more as I understand @Creocree is another guy and some high risk processors represented here may also be able to help you like @ActionMan & check this forum...