Customer Care is ignoring me after requesting cancellation and refund due to bad coverage

I received my sim and had to activate it on the 24hr uncapped service. They immediately deducted the funds from my bank account. When the sim was activated I proceeded to set up the router and the APN settings. The download speed was lass than 1mb/s even though I am in the middle of a large coverage area. I reported this to Rain and they checked all the towers around me and could not find a problem.

I requested to be refunded and that the sim should be cancelled. They have still not sent me a reply even though I have tried to follow up with them.