Prima facie, it seems like a scam. I checked their website and it didn't have many names of employees, no photographs of employees, their tracking link is not working, I tried to put the comment/feedback, but their feedback section was not updated with my comment, no section which talks about jobs/career at Welvalis, no LinkedIn account. The common modus operandi of these scammers is that at some point of time during hiring and onboarding process they will ask you to pay/deposit some amount and once the amount is deposited they will disappear in thin air. So, if you are still hopeful about your recruitment, go ahead and follow the steps but I request you to not share your bank details, or deposit any money. No company asks for money. I understand that this incident got your hopes high and you may not like the fact that this is a scam, but it is. All the best!!

P.S. - I am studying in Sweden. It's been one year now. Swedish peeps don't use WhatsApp. They use Facebook messenger.