Customer protection on repairing of laptops

Good day is there someone who can assist me with regards to the consumers rights? We bought an Accer from hifi corporation in September last year. Since then it has been taken back to the store for repairs twice with the same problem wont connect to the internet. Now again today exactly a week after getting it back from its 2nd time sent for repairs the same problem is accruing again. Went back to hifi corporation and they say it must be sent away again, and if the problem occurs again only then will they replace it. But as far as i know the manager told us if we bring it back a 3rd time with the same problem they would then replace it. But now we are told onmy after its been repaired 3 times and it gives a problem again then it will be replaced. Hoping there are some layers or customer protection savy people that can help.