Disappearing data

As for the past nearly 2 years, I still would rate vodacom a 0 on this specific data number, but I cant. I ahve struggled with vodacom since my contract started to help me sort out the disappearing data which last 7 days after I received my data. They argue that the data is used by myself and is not prepared to assist me, using the excuse we dont have a technician in the shop now and I must come back. Somehow I dont work, and can run up and down to vodacom whenever they insist or when their technician in available which do not want to help me via email, or cellphone to make it easier on me as the client. So this month, once again, my data disappeared, and just maybe I might get luck and someone will asssit me to set this right as I paid the full increased amount on the current not completed 2 year contract. CAN I GET MY DATA OR MY MONEY BACK, THIS IS *****ING FROM ME your paying customer that does not receive what I pay for . ***