Travelling with public transport

Hi:)

My boyfriend and me are planning to visit Bergen in summer and are currently looking at ways of transportation in Bergen area. I already came across the skyss webshop and all but i am a little confused when it comes to the card one can get there. We would be interested in 7day tickets (twice bc we are staying for 2 weeks), and it says that for everything more than 24h it needs to be on the card? But then other posts here say that the card is kinda outdated?

Second issue: when i try to get myself one of these cards online it tells me to enter my postcode which doesn't even fit? It only allows me to enter 4 digits (Norwegian Standart I guess) but mine is 5 digits and my boyfriends' 6 digit long :/// I don't really know what to do:(

Is there any other way to purchase these tickets or am I forced to use that app/webshop 😩?

It'd be veeery kind if someone here could help us out!!! Thanks in advance :)