It seems that getting through to BMI at this time is a complete disaster. People are quoted as being on hold for 3 hours and then simply being disconnected. The website directs you to the call centre and the call centre (auto message) directs you to the website!
Check out BMI Facebook page for similar issues.
I actually got through to BMI ‘Customer Service’ last Friday to be told – quote “I am sorry, BMI customer services do not take customer calls any more’
My advice, the same as Disgusted above, pay and reclaim via letter.