Toggle show/hide filter for mobile

Is it reasonable to be charged $500 for a show/hide filter toggle for mobile view?

I feel like I’m being held ransom by my website developer. I always thought that it should be by default that the filter toggle is there for mobile. Otherwise, when customer load the page, the whole phone screen is only full of filter drop downs instead of being shown the products first.

After signing the package, it seems like I am being extorted for more money just toh have features that are basic good user interface.

Should I consider hiring a freelance programmer to handle the additional things after they handover the website to me?

submitted by /u/midageddreamer
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