BECAUSE THEY CAN ? ! Yea right!

I've been with Virgin Mobile for about 8 years. I had a 'top-op' contract and then every 2 years I can upgrade or stay the same - sure you all now that process. If a pmt was 'skipped' then they will inform you with an sms stating that your services would be suspended withing 24hrs if you do not pay. My phone gave 'sim not provisioned' the 10.12.2015 and couldn't use it. When i phoned they said that i haven't been paying since March 2015 and my account was suspended (after telling them why they haven't informed me, as I thought all is well with the debit order - I didn't get an reply), they gave me an amount to pay and e-mail address where i can send the pop to. When all that was done and I phoned back to inform them of the payment and requested that my line gets unblocked - i got told that my number no longer exists and i can not get it back - WHATTTTT!!!! So i basically threw nearly a thousand bucks in the water???? For somebody else incompetency ??