Customer 58 (Language barrier)

So i kind of feel bad for these people and its kind of their fault but not their fault for these situations but they are nonetheless still annoying. Customer comes into the store, we are in Maryland, (quick google search displayed 87.4% speak only English) She only speaks Spanish. Kind of a problem, i know their are people who don't know English which i for the life of me don't know how they function in every day society in Maryland not knowing English. She is greeted at the door and asked do you need help, her reply is no, ok maybe shes here to browse then. A few min later i come out from the back room and shes standing at my desk, so i ask her what brings you in today? She says phone. so i say ok.... what about your phone? She says new phone. So im like ok do you currently have your service through us? she says no so i say ok, explain we have to create an account do a credit check etc etc the whole thing. She says ok, so the first thing i do because we definitely have a language barrier is search to see if she has an account and she does with 11 phones on it.... and it is in her name, she she obviously didn't understand me. Then we go through the whole thing and it would end up costing her over $500 because she still has an agreement on her phone and you know what she says, oh i want to pay 0 instead and can you mail it to me (luckily her son came in and became our translator). Im like.... soooo.... you came into a store to have us mail you the phone you can pick up right here right now no wait or shipping cost and you want it free and for us to remove your old agreement for no charge.... ummm.... seriously?.... That makes no since whatsoever. I wish i could do what they want to do with everything, let me buy this house and make 1 year of payments then have the bank gift it to me so i don't have to pay the other 29 years, oh this leased car? I leased it for 5 years ive had it for 2 i dont need to pay it anymore i own it now and give me a newer model also for free! This is how these people think, its crazy.