製品に不具合があるので交換したいが、スイーカに残額がある。
This translates to:
"I want to cancel the sweeter
There is a problem with the product and I would like to exchange it, but there is still money left on the product."
Which Garmin product is "the sweeter"?
In any case you have to contact the store that you bought the product in or the support for the product and talk to them about this and how it can be resolved.