Vodacom really sucks

I am not happy with vodacom I took fibre last year September on a month to month basis knowing our house was up for sale. I am in my 6 month now and need to cancel because we are moving to a place that has no fibre lines. Now I have phoned vodacom numerous times and them telling me I will not pay anything now they send me a bill for 1748 for cancelation and 8 must pay 849 end of May which I know but I canceled the 3 May as the 1st May was a public holiday they now told me it's not a calender month so I must pay another month end of June 849 and have no fibre I am not happy with this installations was free so why am I paying so much with a month to month hence 8 took a month to month. I am very frustrated at this point and no one is helping me and I'm forced to sign as I'm moving 25 may.