The customer service said that the phone could only be unlocked by a prepaid recharge of 100 US dollars, but it was not unlocked after charging.

I'm a tmobile prepaid customer. I bought an Apple 12pm to unlock it. The customer service said that I could unlock it by opening the card and charging 100 dollars. I opened the card and charged 100 dollars, but it was still not unlocked. is tmobile the way to deceive customers? My account is ...imei is ...