Poor Customer Service

I joined yellodata on 11 march 2016, for a month to month contract of 250mb of data. I tried to activate the APN setting manually but it didn't work. On the 18 March I contacted the technical support centre for assistance. After calling them 3 times on the day with no response or feedback I still could not access this data. I called on numerous thereafter and awaited feedback from the call centre agent. Irate today(29 March) I finally cancelled the contact. DISAPPOINTING service received from support call centre. I am now in a situation where I have to pay for a product which I did not use due to poor service from Yellodata.