Given a travel related situation, and given a specific question about the situation, summarize the question into a title

I've bought an airline ticket (with SK) that I'm entitled to refund per their Conditions of Carriage because of a schedule change. They've agreed to refund me, but say that they will only refund me to the card I used to book the flight. This card has been cancelled, and I will not be able to get the money from my bank if it is "returned" to this card.

Are airlines entitled to only repay you to the credit card you booked with when this is not mentioned in their CoC? If not, who do you contact to enforce your agreement with them (short of small claims court)?

Refund airline ticket to different credit card

I have a refundable ticket taking me from 'A' -> 'B' and then 'C' -> 'A'. However, I have now made further plans, so that I do not need the C -> A ticket anymore. So, given the limited travel budget that I have, I'd like to have the return / final leg of journey refunded.

The cost of the total flight was less than the one-way tickets from A -> B would be now, so it does not make sense for me to cancel the entire itinerary. I'd like to travel on the first leg, and have the second leg refunded if possible.

p.s. I am not getting off at any layover. The flights from A->B and C->A are more than 15 days apart and I have my own ways of traveling from B->C independent of the airline.

Can I have the final leg of a multi-city flight refunded?

I'm going by bus from Saint-Georges to Cayenne, passing through Roura. Is there any kind of public transport or scheduled service from any of those places to Cacao? Rome2Rio and other sites recommend going by car, but I was hoping to find something cheaper.
How can I get to Cacao, French Guiana?