Cannot provide customer support via email...?!

I am trying to make changes to my MiWay policy, however I am currently overseas without access to my local number, thus wish to do so via email. I emailed MiWay on 1 April asking for changes to be made to my policy, clearly stating I had no access to my contact number. I received a response on 7 April from MiWay that an agent tried to call me yet was unable to reach me thus the changes cannot be made to my policy. I responded on 8 April to resend my request, again clearly stating that I am out the country, and since have not received any further communication from MiWay.

It is extremely inconvenient that an insurance company cannot help a client via email, and extremely poor service to simply ignore a client's request. Desperate for assistance so I can make changes to my policy and be insuring the correct belongings...!