This is not a big problem, BANJERCITO has explicit rules for this kind of event.
If your credit card is expired or nonfunctional for whatever reason BANJERCITO
will be unable to direct the refund to you until you notify them of the renewed card's different number and new expiry date OR provide the number of a completely different operative CC IN YOUR NAME ( underline that)
If you paid cash for the deposit they will pay back in cash .Indeed the El Ceibo. crossing did not have CC capability and they might pay back in cash,
but the sole BANJERCITO representative at that border point has MONDAYS free , so do not go by there on a Monday.
But is your trip a one- way south? If you are going back north through Mex to the USA within the 180 days of the TVIP you do not cancel it when going into Central America. You are allowed to keep it and can even go back into the USA with it and pick up your renewed cc .
.As long as you cancel IN PERSON with the BIKE PRESENT at any one of the border exits to the US or Cental America

However you are probably a computer whiz and should be able to contact your cc company to get the card renewed pronto and , if it is like the MC and VISA with which I am familiar, you should get the same cc number.

This is a heads up to anybody planning a long duration trip:
Get all your documentation refreshed before you set out and have
them all arranged so none expire during your travels.
For details I am sure the BANJERCITO website will clarify this.

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http://advrider.com/index.php?thread....207964/page-5 then scroll down to post #93