Tax office recommends “Sparkassen Depot”

My tax office recommends that I call my trusted savings bank person about a Deka(?) deposit for retirement provision, her husband (also a tax advisor) would have that too - she says it doesn't cost much in fees, but still more than with the online brokers, although she says "the savings bank isn't offline "that often". The reason for this is: I am self-employed and was told by the pension fund “your 214 months of deposits are over, you can leave if you want”. That would be approx.