Mr

I received a call from the above entity offering me a cellphone with a Vodacom sim data contract. After signing the debicheck, they send me a delivery messages and also the amount which didn't show a device only a sim. I called the company and they told me to call Vodacom since they signed the contract is with Vodacom. I find out that they have made me to sign for the savings which they didn't tell me about. Now my worry is that since I have consent the debicheck, they might still take my money. Please help.