JungBoxKR is a smaller-scale proxy service located in South Korea. They provide you with a personal account and link it to your own Korean address. They primarily communicate via WhatsApp so you have it to sign up and work with them. They are slightly more expensive than a lot of other Korean proxies, but they are more versatile since they are a smaller company and they are more amenable to helping with requests. They provide Korean address services and proxy-buying services from Korean websites.

First, you need to have a WhatsApp to sign up and communicate with them. They will help you with making an account when you reach out to them as their instructions indicate.

Second, you can either request proxy-purchasing services by making requests according to their guidelines via WhatsApp chat, or you can enter your personal Korean address and make purchases yourself. They will let you know when items arrive via WhatsApp and send you pictures with a short description.

Third, you then have 30 days from arrival of your first parcel to either consolidate or not and then ship your items from their warehouse. They charge a box fee based on parcel size, and then they typically offer EMS and EMS premium as their primary shipping options.

I think JungBoxKR is generally great, they are my primary Korean address/proxy service. 

They do have some faults compared to the bigger companies, mainly that they work very sparingly or not at all on weekends, so if you need to make a proxy purchase or request consolidation or shipping, you should do it during their business hours on weekdays in KST. They are also generally a little more expensive, again, likely because they are a more personal, small proxy service.

They do have many benefits though, including: ability to order from most Korean stores and resale sites for you with a small fee, take special packing requests (like pouring out a commemorative bottle's contents so it's easier to ship), provide unboxing services for a fee, are very responsive during their business hours, and they have very efficient but protective packaging for parcels they pack.

Overall, I do recommend their service if you are able to justify the slightly higher costs, are able to communicate with them during their business hours (aka if you're not a weekend shopper), and want a more personal proxy than other popular options.