Bakgaga have struggled in the Absa Premiership since being promoted at the end of last term as National First Division champions, with the side currently propping up the table with nine matches left.
Mammila believes Baroka - whose technical team is now led by Kgoloko Thobejane and Milton Dlamini following several changes in the new year - are paying the price for making bad signings in the off-season.
"We learned a lot," Mammila tells snl24.com/kickoff.
"As a PSL team we have learned how you run a team. We also learned about the signing of players. Remember we had just been promoted and so we were just excited for being a PSL club and ended up making a lot of unnecessary signings. Some of the players we signed at the beginning of the season were not supposed to be signed."
Dlamini was hired earlier this month to serve alongside Thobejane, who was initially redeployed at the end of last year with the appointment of Jacob Sakala as head coach.
However, Sakala, assistant coach Edward Williams and technical director Mark Harrison were soon suspended by the club for reportedly refusing to sign a letter assuring that the team would win their next four league games.
The trio on Monday were given 30 days to appeal.