Vodacom contract mistake

I have a contract with vodacom lost my job and couldn't pay them when i eventually paid them the arrears they telling me my number was deleted from vodacom and that i must pay them the full amount outstanding but i dont work anymore vodacom is impossible because how must i get there whole amount and what about the airtime they not gna give me that amount x whatever months i owe im upset nd if this is the case then its fine keep ur number ill get a new number from a better network nd whenever i have money will pay the rest so bye...................... Worst mistake ever