I enrolled my sons, age 5 & 7 for the 3G abacus class

They've been in the course for 5 months already & i still havent seen the benefits of it yet. Spoke to the teacher & according to her, they're still at the elementary level, they need to progress more into it, to be able to apply what they've learnt. Im thinking of terminating their classes as im doubtful of how long this will take, i would rather sign him up with another enrichment course he enjoys whereby i'll see results in a couple of weeks.
Would appreciate if you could share your views, Thank you :?: