Need company contact info.

I would like to write an email or letter to your company regarding my experience with the Clearblue Digital Ovulation Test (2 mo supply) Lot No. 4086937224. I have had more "errors" than results - and am very frustrated. I've switched to using a sample cup versus urine stream - and have followed the directions to a "T". The tests are far too expensive to have to throw out more tests than getting any results. I've had to go through a 2-month supply in less than a month to continuously repeat the tests. Thank you for your time.