NEVER TAKE A CONTRACT PHONE WITH DIGITAL

On the 9th of August, I returned my phone for repairs since it has a charging problem.0n the 16 i received an email claiming that my password is incorrect i resend the correct password and still its not working. I requested them to send the phone back so that i can open it if they cannot open it, they told to pay R400 so that they can reset the so i didn't understand must i pay but i can open my phone if they cant. Now they ignore my emails when i call them no 1 is picking up, i went to the store the guy who works for them when he make phone calls and send them message's they do pick up and respond and its almost 2 months they keeping the phone but i must pay for something i don't use how is that right