Bait and switch for full service

I have now been quoted three different prices:

This morning, after uploading my preliminary documents, the pre-expert call rep quoted me $400.
Then, after uploading the remaining two documents, the pre-expert call ran me through all of the questions and quoted me $488.
Finally, with nothing changing, after running through the filing with the "expert", I went to process the filing and am being asked to pay $699. I checked on Reddit and see I am not the only that this happened to. The "expert" claims it is because my filing ended up requiring "2-3 more forms", however, nothing changed from the pre-call.

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