Fine print promise changing ******

What a joke!! First I notice in November 2019 that Webfrica is charging a very different price as to what I'm paying for their fibre service. I called and was only given one month (the current month) credit for the "error". I was a customer since December 2016 and when they reduced their prices they just continued charging me the old price. Then, now in January, after collecting my payment, they disconnected my service for non-payment. Again, after a very frustrating 150 minutes phone call (on my expense) I finally got to someone that didn't say things like:"I should pay my accounts and this won't happen" and realised the mistake and reconnected my service. Needles to say I have cancelled my service to shift to a new ISP for my fibre. Now I have been greeted by an email saying that I must return the router in it's original packaging or I will be charged the current retail value of the router I was supposed to get free on a 12 month contract. So to sum up, overcharged for what could be a year, disconnected and insulted for what was their mistake and now I have to pay for an old router, or return it at my expense. Please, I implore anyone, DON'T USE WEBAFRICA