Hmm. I see you are 13-15, so sameage as my daughter. Talking back, lying (which is essentially what you are doing) and not keeping a promise are spanking offences.
Lying is the most serious offence you commit when doing this. I would spank you bare with my hand, then talk to you midway through, before probably either a lighter (but still painful) belting or a paddling, before another talk about dishonesty etc; and not keeping promises. You would probably end up doing an extra chore around the house for a month maybe, to make you still remember to keep it going.
Then, I would punish you for talking back. I take each offence separately. I would probably allow you to go on for a day or two (depending on how you looked after the spanking), when you would be restricted (no computer, TV etc;) and computer, and I'd talk about talking back and disrespect, and get you to write an apology note to the whole family for being disrespectful. When I think you are ready, I would repeat the spanking with the hand (it hurts a lot!) and probably then talk, then use the spoon, then give you a comparatively light spanking with a paddle, all in one sitting.
Both issues (lying and talking back) signal disrespect, which is always bad in our house, and will always merit a spanking.
I would also probably try and set up a routine/timetable for at least three months (not keeping to it would be a light spanking probably) to get you more used to doing things when you say you will, to get the problem solved.