Billed for their error

Vodacom bills me for an error due to their incompotence. Now they threaten to disconnect my service, and I logged a hellopeter re this error already, and was advised to contact billing, who in turn does nothing. Vodacom you cost my husband his employment. I am working toward my diploma and volenture how do you now propose I ay the account after you cut my family's only source of income. IDIOTS