Geyser under guarantee

My reference no. 196165. My geyser burst on Wednesday and I contacted my insurers and the geyser was still under guarantee so they sent an sms to me on Thursday morning to say that I will be contacted by a technician. No one phoned me on Thursday even after I had phoned them enquiring if someone was coming to replace the geyser that afternoon. I was phoned on Friday and Saturdayby technicians whom I told that I was not available and that they should rather install the geyser on Monday. This morning I was phoned by another technician who could not even confirm what time he would be able to come to fix the geyser. It is 15h30 and still no call from Kwikot. Kwikot does not take their customers seriously especially when it comes to honouring a guarantee. If I had a choice I will never ever fit a Kwikot geyser if this is the after service you get from them. Thank you. Regards Chris