Dissapointed by rain

I have purchased the 101 router from Rain last year September, then paid my R649 monthly installment fir October,November. Then December I missed my installment and made the promise to pay for R45 then they made two debits for that R45 ,January made my monthly payment of R649,February as usual on the 16th made my monthly installment of R649,and my promise to pay was R411.75.March the 13th I made my monthly payment of R649 while the R411.75 was still outstanding. But on the 25th of March,remember its a week after my R649 payment,my bank notified with a declined transaction of R649 from Rain.and immediately they disconnected the router.i have spoken le Leila from their billing department..she said the R649 is for the declined debits whereas I have made payments for those declined debits.now they want me to pay another R649 within 2 weeks makes it R1300 in 2 weeks...with the R411.75 .Rain are professional ****mers.how can a person pay R1300 for a router within 2 weeks.their router even if you paid sometimes takes a week or 2 with unstable network. They are really ****mers this people.they only care about money not resolving the issues.they just take you from one pillar to post.