locked in for 2 years after contract expired without a handset

Vodacom offered me a no sim deal after my contract expired saying i can change it at any time later on and take a handset , failing to mention they will lock me in for another 24 months without a handset , looking to terminate my contract as i have no handset and knowing my contract is on month to month after the 2 years of paying up my device i find this *********