Hey Ben
That's alright, we can get you sorted, and what we do is really easy with a little knowledge and some good test results. We can help with Both. With the Green Pool you'll need to SLAM it. It a process of repeated adding of Chlorine to a higher level and keeping it there until the Algae is dead and the pool is clear.
You need a good test kit on the way first. For a Green Pool the best value is the TF100. The K2006C Is also a good kit, but you'll need extra reagents and the 100XL has them at a much better price per test.
Next is knowledge. All that is here in Pool School and the first place to go is the ABCs. Eveything you need to know is in PS and there are many around who will enjoy helping you through with any questions.
For sure you wont need the Phosphate products, so dont add those yet. Take them back or hold the receipt, and perhaps trade for something else. Once we have some reliable numbers from you, we can offer suggestions.
The links you need are also in my sig line below here: