HELP!! Mazooma Monopoly WOW

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i just brought this just to have as a feature in my house but seems like its more complicated than it looks every time i put money in it just goes into the buckets underneath and how can i test if the hopper works im just so clueless can some one please help???

also do not have the refill key

[million$tedz]

mite need key to refill

edit: !