English is getting harder with English., I am waiting your help!!(5)

Hi, My questions about the new job doesn't aren't finished yet.. It might keep going long  They might continue for a long time......
This time, I want to ask about payment conversation~~!
and Please correct the below journals below to a more natural conversation. Thank you:)

15. When I have some problem with the POS machine.

(1) case1 : when customer's card is declined 

Insert your card please. Oh, Your card is declined. /It has been declined. Your payment is was not successful. /Your payment doesn’t didn't go through well. Can you try one more time?/ Please try again.  All of these are good ways to say it!

This card doesn’t work. Do you have another card or method of payment?

(2) case2
Hold on one second please. There’s a some problem with the computer.
Our Pos machine just suddenly has frozen right now.(or stopped/ black out/ broke down) I think the best way to say it is the POS machine is frozen or the POS machine stopped working
I am trying to turn on again. (restart… How can I say that..properly?) I am trying to restart it now.  

(3)case3
Oh, the receipt paper(?) is no more ran out. Can you wait a moment while I replace it?
I’ll change this paper as soon as possible, I’ll help you, soon.
Thanks.

(4) case4
What would you like to pay? What do you want to pay? What is your card?
Which card do you like to make payment?

These are sort of hard to understand? Are you asking if they want to pay by card or cash?  In that case you should ask, "How would you like to pay?"  Are you asking what type of card they are using (Debit or Credit)?  You can say "Are you paying with debit or credit?"  or even more simply "Debit or credit?"  Are you asking about the card vendor (Visa, Mastercard, American Express...)?  In that case you can say, "What credit card company are you using?"

Good luck Ji Hee!  For number 4 if you want any clarification or have other questions please ask :)