dis=1. nicht 2. ab-, ent-, un-, weg-,
etc.
I would say in this context it means that: die Bank bietet keine bankueblichen Zwischenprodukte wie z.B.
. . .

I have found this definition of disintermediation at the address below:

Disintermediation means the elimination of the "middleman," especially as made possible by the Internet and electronic commerce. Among the functions that, through information technology, are now being widely disintermediated are those of wholesalers, retailers, distributors, bank tellers, insurance brokers, travel agents, and gas station attendants.

I have also found "Disintermediation" in German texts, but I have NOT found the corresponding verb (which would be "disintermediiert").

Keeping in mind that the German language loves nouns and compound nouns, what about

Disintermediationsbankgeschäfte?

or, if that's too long

Disintermediations-Bankgeschäfte?

Once one knows what it is, it should not be impossible to work one's way round it, but I would include Disintermediation somehow.

Good luck!