Swimpool center

My mom had a issue with her pool in December which we managed to fix our swimming pool. swimpool centre sent there guy around without telling us that they where going to charge a pensioner R450.00 for a call out fee who live 4 streets away from swimpool center. Now they are sending this account to my mom Without signing anything or agreeing to anything and they did nothing. And they did not warn her of the amount before or we would of said no thanks. That's really sicking there call out fee and for what we fixed our pool our self . Disgusted with there service and the staff there has such attitude to .