I made an Asos purchase with klarna a few months ago and returned it. I didn't hear anything from Klarna so forgot all about it, assuming all was well. However, today I received a text from what I now know to be a debt collection agency asking me to call them. I checked through my emails and can see now I didn't get a returns confirmation (I know, my fault for not noticing earlier). I contacted klarna to see if I could pay them but they said no as the debt has now been sold on.
I'm just looking for a bit of advice before I contact the debt collection agency because I have no experience of dealing with them. What kind of things should I be asking them? And I can see the company has an online payment facility, am I best to pay it this way so I have a record of the payment? Also, are they likely to add money to the original debt? The debt is only £80 so I'm able to pay it but just worrying it will have gone up as it was sold. Also, I've had a look at my credit file and there's no record of this debt will it go on my file if I pay quickly?
Sorry if these are daft questions but as I said it was a genuine oversight on my part and I've never had any debt issues so am totally clueless about how this all works.
Thank you in advance!