Poor network and customer service from the call center

I started experiencing network issues on the 1st of August...I first assumed it was my device...I reset it daily until I called the service provider around the 8th August....I wasn’t assisted....I then called the store I opened the contract with and they assisted and assured me I will receive a call from a technician which will give a update and quote me a reference number on 14th August 2019....I also called the cancellations department from the 14th....on the 16th cancellations department gave me a reference number and advised me to give in my device to the store I purchased it from and the cancellation will be done....It is now the 19th and I am still without network and will be billed as usual on the 26th for a service that was not rendered to me....I have tried to cancel my contract but I am getting given a run around between the store and cancellations department....Can someone kindly contact me and cancel my contract....