Mweb suspends account with no way of contacting them to sort it out!

In November I contacted mweb and requested that my bank details are changed. I was promised that a form would be sent to be completed, I never received the form. Then I contacted them again in December. A form was sent, which I completed and returned. The bank details were not changed. I then received a sms in January to say that my account is in arrears and to settle immediately, I tried in vain to phone Mweb, as it comes back saying that the number does not exist. On Tuesday I again got a sms and again tried to phone them, same automated message to say the number does not exist. I then proceeded to pay not only the outstanding amount but double that to allowed for them to do the changes. On Wednesday when I tried to acces my account it said that my service has been suspended and to send an e-mail to mweb if I should have queries. How would I send an e-mail to mweb if my account is suspended? On Thursday I tried again, to no avail. We are now on Friday, I have now sent them an e-mail via g-mail with the change of details forms and got an automated reply saying it is for forms only. There is no other e-mail address that I can see that can be used. All numbers come back as "no longer exists". I left a message on their facebook page with my acc number in the message, just to get an automated reply saying that they cannot assist me as they do not have enough information and to DM them with my account number (which is in the message). I have sent them a DM, no reply.

I have been with Mweb for almost 20 years!!!