I fully understand your frustration as I have had the same problem for TWO YEARS. lol I remember reading on another weightloss forum a few years ago about this woman who was finally losing again after a 2 year plateau, and I would think, "how does this woman continue on?? how unbelievably discouraging! WTF!!". I have finally lost one pound off of my plateau weight doing some new things (including some hormones prescribed by my doctor). So yeah, the body is a weird machine that is far more complex than just the number of calories we're eating.
In your case, many people have stalled because they were eating too little calories. Most people recommend increasing your calories to see if that enables your body to start losing again. Other remedies are to switch up the foods you're eating and/or the exercise you're getting. As far as your exercise, the kettle ball/strength training stuff like lunges and squats are great. Leg weight exercises burn a LOT of calories because you're using your largest muscles. However, you're saying you just walk everywhere. Well so do I! I live in one of the largest cities in the world and we generally walk everywhere every single day. I live in my family's apartment building on the FIFTH floor. I walk those stairs several times a day, often carrying groceries or my 3 year old (who now thankfully zips up the stairs). Point is, this walking around is not enough to get my weight off, even when I'm NOT on a plateau. Its a good start but maybe its time to add more exercise?
So a starting recommendation would be to re-evaluate your food, minimizing grainy carbs as they are known to cause bloating and inhibit weight loss, increase your calories by 100 calories per week (so 1300-1600 this week, 1400-1700 next week etc) until you start losing again or get up to reasonable maintenance level at your size (maybe around 2000? having not done the math).
Remember though that one option is NOT giving up your new healthier lifestyle, for if we give up, we will merely be a HIGHER weight than our plateau weight and that weight will climb up from there. My very best of luck to you in beating this plateau!