It’s not at all uncommon to only be able to see the superficial pigmentation at an initial examination, as the superficial pigmentation very often lies directly over dermal pigmentation, and it’s only once you remove a lot of what is lying on top, that you can see the dermal pigmentation left behind.
If the pigmentation that has now remained on your skin is dermal, then the products you are on are great to try and prevent that pigmentation from worsening, but you need to bear in mind that MOST times, dermal pigmentation has internal triggers and you cannot only treat it from the outside.
You may want to consider doing inject-able Mesotherapy and you quite possibly are going to need some supplements to help treat from the inside as well.
I would definitely recommend that you have a follow up consult and re-examine the pigmentation that is left and investigate what triggers your pigmentation in order to have the best treatment options.
