When we chant the holy names of Sri Krishna without sambandha jnana then we are not chanting the pure name of Sri Krishna but namabhasa which is semblance of the holy name. Always remember that you are covered by the filth of ignorance, that is the gross body and subtle body. The only way to get out of this is to strictly follow the order of the spiritual master to the best of your abilities and chant the holy name thinking that I am the eternal servant of Sri Krishna. Then your chanting will quickly bear fruit of Prema bhakti.