I would assume you have a Petunia which are called Betunien in Europe, where your plant may have been grown.

It is a type of begonia Guest so you will need to bring it indoors in autumn.

Ilex is more likely to be correct in this case though there is a Betunia begonia.

Ah yes, there are a range of Begonia hybrids (grown in Holland) called Betulia which seem to be popular in DIY stores etc. this year, so that's a likely possibility MG!

So it could be:

Betulia
Petunia
Betunien

lol..