We can't tell you what the problem is in your code if you haven't included any of your code to look at. I suggest that you take a look at your code in more detail.
Why aren't you passing the filters as part of the query string (qs)? I am not sure what library you are using to make the request, but when you pass special characters (>=) in a URL they need to be encoded correctly. I assume passing them in the qs will do that, otherwise you need to encode the querystring in the url you are passing. Also, you shouldn't be passing the access token in the query string, you should be using a header - https://docs.clover.com/docs/using-api-tokens
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