I purchased my Icelandair tickets through a travel agent and these are the difficulties i am facing now

- I can not purchase excess baggage in advance (you get 20% discount if you buy in advance)
- I can not pre-purchase food
- I am not sure if i can check-in online now.

The only thing i could do is assign a seat. Icelandair is penalizing customers who purchase tickets through travel agency, they explicitly don't tell these things on their website, these i the things i learnt the hard way after purchasing the ticket. Has anyone faced the similar situation ? Their customer service has un-acceptable wait times and you have to wait 30 + minutes to speak to someone. This will be my last time flying Icelandair.

Thanks.