Telkom unprofessional

Almost two months ago I went to the local telkom outlet in Upington at the Kalahari Mall to apply for a Lte router and Sim package on a Monday I think it was 1st August, in the first place the salesman told met he don't have stock he is waiting for it but it will be there on Wednesday he **** to me about that, that arrived only on Saturday, they called me early and I went down to the store finished everything I asked the sales guy 2 or 3 times is he sure I won't have any problems because I resides in Rosedale area, he said no he tested it and I connected when I arrived home I connected it but immediately show connected without internet, I immediately called the shop and tell them what is happening then only another person said that hey are experiencing connectivity problems due cable theft in our area as well as closer to the tower I asked this guy why did they lie to me and not inform what is going on, he said the problem was only temporarily, I ask him how long did they experience the problem he said it was 2 weeks but the technician is working on it, I was very mad and felt misled and tell the person I'm going to cancel everything because **** to me, so a lady did something on the computer and said she cancelled it but want me to take the router with me because I must pay for it, I refused, I left the shop got a reference number, now this month telkom send me a notice the are going to deduct my installment for this month. This is not acceptable for me because they **** and I must pay a price now