Markings on Bottles

My 120ml Feeding bottles lost all their markings after 3 months use! I can't measure the water for my toddlers milk anymore!<br> Started using the 240ml bottles - same thing is happening!<br> Sent them a mail in March 2015- with one response - - where am I situated??<br> I phoned them a week later - stating that representative will contact me - - its June 2015 and I have not yet received a call, email, nothing!!!