Kandua app. Need to fix for struggling tradesmen

Kandua the app as a struggling tradesmen I've tried it. I can't afforded thousands of rands like big companies.so tried kandua...it's **************** I've spent 1000 rand on it and made nothing. They claim to return. Your credits if you don't get the job ..they lie. Also when you go to Leroy.merlin you find out that they set prices . Little stickers saying get your sink installed for 400 etc..the clients now think this is the price. .they run a nonsense app.