No willingness to assist with repayment regarding data which was hacked and put my account in arrears

I was with Vodacom for over 20 years paying every month my account never skipped a payment but recently my data account was hacked and it went over R7000-00 which brought my account in arrears / we called the collection department and request some sort payment plan but they insist half to be paid now and rest by 15 Oct . I explained that I am unable to pay this due financial situation I cant afford this. They refuses to assist with any payment plan and i am willing to pay it monthly off but they refuses. I am not happy with this and keen after 20 years to go somewhere else. Not really assistance with a company that doesnt care about the small individual.