CONTRACT PHONE REPAIR

so i took a contract with mondo last year august,all was going well untill this year march when my phone couldnt read a sim card,i took it to mtn that booked the phone for repair,beginning of may mtn told me i must call mondo to request a cancellation so that mondo can issue me with new phone.i did all that and i was told my contract need to be cancelled first so i can get a new phone,i have been following up on that and always getting diferrent respond,i am now stuck without a phone for 3 months now yet i am paying for it.i feel like my issue is not important to mondo at all.everytime when i follow up the agent will tell ,e it takes 4 to 14 days to sort that out but its been way morethan those days,mtn cant assist as well as the contract on mondo s side is not cancelled