No internet connection

I've already paid my arrears in full. After I've contacted mweb I was said that my contract was cancelled without my knowledge. I've asked them that I still want to go on with the contract which they said will be activated within 48 hours 2 weeks ago. Up till now I do not have any access to the internet. The internet on the white ZTE box the internet shows but not on the black box. Although I've tried a few times to make contact I only get through to the sales department. Please assist me to get connected before you again deduct R700 from my account.