Pandora is free; SXM is expensive and not as good

I cancelled my SXM today. I think.
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I paid by annual check. $23 a month!
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Last time we paid, they turned it off demanding a late fee.
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A late fee? They cannot turn it off for being late AND demand a late charge. What are they going to do—turn it back on retroactively?
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My last bill from them demanded $38.83.
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When I contacted them to cancel it and get a refund of my check payment, they said they would turn it back on and keep my check.
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What part of “cancel” do they not understand?
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After about 20 minutes of arguing and offering to cut the price like 77% and them saying they would give me a credit, I said I want a CHECK for a refund of my check, NOT a credit. What good is a credit to me?
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Pandora, in contrast, is free. And they do not have a commercial every ten minutes bragging about not having any commercials like SXM does.
SXM finally agreed to send me a check in the next 7 to 10 days.