Poor service

I made a fixed term arrangement with Diners in 2014. I was granted a fixed amount for settling the account in 24 months of R1050 per month including interest. I opted for that option because the call center agent by the name of Temi Matlejwane advised me that, if I go that route, the interest Diners was charging on outstanding balance will be stopped. Meaning, what I was owing then plus interest then, I will have to pay. Hence the amount of R1050 was the amount that I was supposed to pay for 24 months, this amount already included interest. The call centre Agent (Temi) forgot to tell me that my 1st payment will include an amount of +-R300, which is the interest from the 9th June 2014 the day the arrangement was granted to the 15th of June 2014 the closing date for my account cycle. So I was supposed to pay R1050 + R300 for the 1st month. No one told me that. So this R300 grew over 18 months because of interest and penalties. I want to settle the a count this month end. I sent Diners club several emails, directly asking Mr Ibrahim Khn(Team leader) to contact me, up to now he has not contacted me. I sent the 1st e-mail on the 7th of Jan 2016. I also asked Timothy Chauke to call me