Very disappointing customer service and bad experience

They arrived at our business in 2018 claiming the phone lines needed to be upgraded, no other explanation. They managed to sign us into a 5 year contract which we can not get out of. This was never explained to us, we were simply asked to sign and initial each page thinking we were dealing with Telkom. Our clients could never reach us on our phone's landline after that because constantly the "network is unavailable" so no phone since moving over to the "new lines"... I have since cancelled my land line with Telkom thanks to this company. We were supposed to "save money" with the "new lines" but today we are paying R864.84 for wifi when the contract amount was R650 monthly. Advanced Telecoms' sales people need training and TARA who works in the accounts department needs a course on customer liaison asap. I asked for an updated statement and invoices as (since 2018) I have not received 1 invoice and need to update my accounts system. I get a mail attachment referring me to wesbank legal - are you serious? I was not even disputing anything. This is how you deal with clients you debit monthly? DO NOT GET YOUR LINES UPGRADED IT'S RUBBISH and a con to sign you into a 5 year deal and arrogant staff.