Tymebank - account to be closed

I requested for my account to be closed. I have all my email trails of how the service was rendered so not going into detailed explanation however I have changed my cell number so the number on the account was not in operation. They insisted that I call them after I explained that as a pensioner I did not have the means to call them back and provided them with my new number to please give me a call. I eventually got a response asking me to pay the outstanding R7 in order for them to close the account. I don't mind paying it but R7 for Tymebank is so small an amount that it's mind boggling to ask for. I am not asking for this to be written off. I am doing this to ask what is R7 between a huge organisation like Tymebank and a pensioner. I however did not respond to the email to confirm that I would pay the R7 but I will as soon as I can. Thank you