Modern Eavestroughing

I contracted Modern to do eavestroughing on my middle unit townhouse. Both townhouses on either side of me also contracted with Modern. We were told we would be called the day before installation. No call was received by anyone. I was the only house of the three with a temporary grey jiffy pole supporting the porch roof which was there at the time the estimate was done and was the support for the downspout that they installed(very prominent location on the front of the house). They installed grey eavestrough to match the jiffy pole. I had discussed with the salesman at the time he did the contract that the jiffy pole was temporary and was told that if it was still there at the time of installation that the grey eavestrough would be replaced with white and fitted to the column as soon as the column was installed, at no extra charge. I was even told that this had been done for a previous customer down the street (I should have verified this!!!). I called a few weeks later when the white column was installed, and was told that there would be an additional charge of $150 cash to replace the grey downspout with white eavestroughing to match all of the rest of the eavestroughing on the 3 house unit. This was not what I had been told at the time I bought the contract. I made the mistake of paying in full for the job because I trusted that this company would fulfill their obligation. BUYER BEWARE. Hold back if they do not finish the job as contracted. Asking for an additional cash payment to change what was supposed to be a temporary installation, when I had already paid in full for the complete job, with tax included, is certainly not acceptable and indicates questionable business practices.