5 days no Service internet and throwing client around like a ping pong ball between the two

Day 1. no internet service , called cell C - they told me that Vumatel is doing servicing in the area and there is nothing wrong from their end. called Vumatel , they told me no servicing is being done and my line is fine from their end. Day 2 . Called cell c , they told me their end is fine but they see a problem in Vumatel side with port configuration. "Port Unknown" Day 3 / Day 4 Vumatel unable to respond Day 5 Vumatel responds that line is fine . I specifically asked for the port unknown issue, Vumatel reverts that its fine the problem is with cell c. I cal cell C , they again say the problem is at Vumatel s end. I share the mail received from Vumatel confirming all is ok to Cell C . Cell C then makes me reset /Reboot etc the router , nothing changes. I issue a final notice for rectification else no option but to cancel service to both Vumatel & Cell C . Then they send a technician , Johan to my house who takes a screen shot of Ping response on command prompt . Still maintaining that the problem is from Vumatel and he is escalating it to his manager. Awaiting Meantime Grace from Vumatel calls to tell me that the problem is from cell C . Asks me for CPE serial number and photo of lights. I am Frankly done. it took me si weks of frustration with Vumatel, Britelink, link africa to get the connection online , now within a month the connection is down and frustrations started,. Vumatel & Cell C if you are listening, please resolve ASAP between yourselves , else i have no option to hold you guys in default of services and terminate the contract.