Poor service and breach of contract

The problem is that the company is easy to sell their products however employees is unable to assist in any manner whatsoever, i have taken up their deal of a 4mb line which worked fine for a month or two then went to the capability of 2mb, which one can look at as breach of contract as their technical support has no inclination to contact one back, so their support is worse than telkom which actually has step up their game and assist better and has polite people on the phone, however mwebs sales responded to my query but do they really have the expertise to advise on the technical issues, no they do not, and i do not think i will blame employees i will like to make sure the CEO knows that he is conducting business poorly if this is what an isp does passing the buck technical staff does nothing with a query, its bad company ethics but alas end of the month they want their payment from the clients....