over charging every month,. **** promises, Terrible support and service

<p>I had Netstar on my vechcile from 2011 and from last year december they have been charging me extra every month month, i contracted the customer services they advised me it was an error on their side and will be corretcetd , however this has bnever been done then they told me i will be credited since they cant do refunds and this month they over charged me again. They keep promises me sort out this error im really tired of keep calling and explaining myself from every month why im being overcharged, can i cancel this unit because u guys have been over charging me for the last four months before even telling me why.. I understand its and werror how can this error happen every month. I used the portal that you guys have which is a waste of time because nobody replies or deal with those wqueries so thats of no use! im highly dissappointed and i hope someone can sort out this issue.</p>