Bad service Vodacom

Dear valued Vodacom customer, your contract term for this line will soon come to an end. Upgrade at your nearest Vodacom Store or online at www.vodacom.co.za. If you do not wish to upgrade or cancel your contract yet, it will continue on a month to month basis and all discounts will stop from the end of the contract term. This was the sms i received this morning i take the time drive 109km to my nearest branch,when i arrived there they told me i can not upgrade before Sept then they phone vodacom call centre and they told them it is not there mistake but vodacom direct and they can do nithing. Monday they phone me in the evening and told me my account is overdue i phone them tuesday morning then they told me they maka a mistake. So i want to know what are they going to do about this bad service and treatment i have received this week? I need some refund for this bad treatment after 20;years i am not very up to this bad service. Hope to hear from vodacom soon.