Seems fairly simple as you are soon to be out of ‘contract’ next month , once you are outside the minimum term you could simply serve notice to quit , 30 days notice is required that you pay for , you could give this notice as soon as you are outside of the minimum term , you could even make the 30 days notice to also be the last month of the minimum term, if that suits you, but obviously that may before you actually leave the address leaving you with no landline type service.
Its pointless renewing FTTC to ADSL as you will then be inside a minimum term with your ADSL service, if you don’t renew your existing FTTC service continues on an outside minimum term basis until you do something, that’s either quit or renew ….if you don’t renew, you won’t have any contractual obligation .
you can quit penalty free (but with 30 days notice ) whenever you want , but as stated the out of contract price will probably be more than you pay now and more than if you were to renew but it gives you flexibility to quit whenever it suits you without any further penalty
