You are repeating a Russian lie https://blogs.lse.ac.uk/politicsandpolicy/exposing-the-myth-...

There was never a promise.

>Beset by chaos at home, an increasingly beleaguered Yeltsin turned to historical revisionism. He began to interpret the Two Plus Four Treaty as a ban on NATO expansion east of Germany, on the basis that it only permitted alliance activities on East German territory. He (and later Putin) claimed that the failure to mention Eastern Europe, together with the stipulated restrictions in relation to former GDR terrain, meant an implicit Western rejection of eastward enlargement.

Also later

> At preliminary bilateral talks in Helsinki in March 1997, Clinton refused to respond to Yeltsin’s call for binding restrictions on the establishment of NATO security infrastructure in new member states.