I got slapped with a temp ban yesterday, i was really cautious too. I had the bot running for maximum 3 hours at a time and took DAYS breaks inbetween. I mixed activities and i was only using this bot. Im not blaming cuppa at all, this is a great bot that runs well. Getting banned is simply luck of the draw, its not "if" you get banned, its "when". My advice to anyone wanting to use this: be patient and wait until cuppa comes out with an update or something to improve stealth, like a few people stated below, Jagex is hot on this right now and extra caution needs to be taken. Thanks for getting me this far Cuppa, much appreciated :)
Do you have more specific info on what the bot seems to be doing wrong? Maybe prepping slow or something? That seems to be the most common issue, though it's a bit hard to nail down as it's often due to 3rd party software throttling runemate (eg 3rd party antiviruses, firewall, etc). Or any settings that might be changed.
Feel free to test using trials and let me know if issues persist. And/or you can submit refunds via the Sessions Page if you like.