Is the new EC-230 device worth the upgrade from c1200 in term of wifi strength?

Is it possible to suspend TIME internet subscription for a few months? I was not at home for several months during MCO and I switched off my modem. I think it is unfair to chair the full amount when there is no usage. The house I am staying doesn't have TIME coverage, therefore I am unable to move the subscription. Is there anything else I can do or I must pay the monthly bill as usual because it is still under contract period?