Pantene shampoo and conditioner are not the best things to use as they can build up on your hair. If I was in your position (and I once was), I would begin by clarifying my hair, using a clarifying shampoo. This will be drying, but will get rid of any build up.
Then get a rich, creamy conditioner, or deep conditioner. Suggestions include Jessicurl Too Shea
and Elucence and KMS Curl Hydrator. The first two can be found on this website, in Curlmart. Are you American? If so, I'm sure some American curlies can recommend some other good conditioners for you.
Next, throw away the brush. Some curlies on here like to brush, but I would put money on it that for your hair type, brushing is a very bad idea. Instead, try using a cream or a gel to style your hair. This part takes a fair bit of trial and error. You may find you need to use more than one product, and it takes a while to work out how much to use and how best to style your hair.
A good gel to try is Batia and Aleeza gel. It can be found on Curlmart too. It is very popular on this site. It is expensive, but you get a lot for your money and it is effective. If you're on a tight budget, we can recommend some gels or other products, or you can do a search of the webboards. I know there are some great threads discussing the merits of various drugstore gels.
You may also find that you need a leave-in conditioner.
After you have washed your hair, while your hair is still soaking wet, try applying the product by raking it through and covering all your hair. Then use an old t-shirt or Aquis towel to gently scrunch the drips out. Do not touch your hair while it is drying. That is, perhaps, the main point - not to touch your hair whle it is drying. You may find that you prefer to let your hair dry a bit before adding product, or that you like the plopping method or like to scrunch the product in. There are no right or wrong answers - it's all about what works for you. You might want to avoid towels when drying your hair, as they can cause frizz.
(can be found on Curlmart) is good for helping with frizz.
You may want to consider the ingredients in your products. Many curlies like to avoid drying alcohols (Benzyl alcohol, Isopropyl alcohol and alcohol denat.) and silicones. Some fine that their hair isn't fond of too much protein. There are various threads and lots of information on ingredients on this website.
Good luck and feel free to ask more questions.